Access violation after porting project to VC2005

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  - 1
    - ReadDirectoryChangesW does not provide the renamed filename when renaming a newly added file Regular renaming works fine: 1. An existing file 3.txt exists at the c:\scripts directory 2. Renaming 3.txt to 4.txt, the following code works fine. Renaming a newly added file does not work: 1. Add 5.txt to the c:\scripts directory 2. Rename 5.txt to 6.txt Noticed 6.txt is not printed. The new filename is blank. Is there something wrong with the buffer access at the FILE_ACTION_RENAMED_OLD_NAME Thanks, Josephine ----------------------------------------------------------------------------------------------- // TestRename.cpp : Defines the entry point for the console application. // #include "stdafx.h" int main(int argc, char* argv[]) { CString m_dir("c:\\scripts"); HANDLE hDir = CreateFile( CString(m_dir), // pointer to the file path FILE_LIST_DIRECTORY, // access (read/write) mode FILE_SHARE_READ|FILE_SHARE_WRITE, // share mode NULL, // security descriptor OPEN_EXISTING, // how to create FILE_FLAG_BACKUP_SEMANTICS, //|FILE_FLAG_OVERLAPPED, // file attributes NULL // file with attributes to copy ); FILE_NOTIFY_INFORMATION Buffer[1024]; DWORD BytesReturned; while (true) { int ret = ReadDirectoryChangesW( hDir, // handle to directory &Buffer, // read results buffer sizeof(Buffer), // length of buffer TRUE, // monitoring option // filter conditions FILE_NOTIFY_CHANGE_SECURITY| FILE_NOTIFY_CHANGE_SIZE| // in file or subdir FILE_NOTIFY_CHANGE_ATTRIBUTES| FILE_NOTIFY_CHANGE_DIR_NAME| // creating, deleting a directory or sub FILE_NOTIFY_CHANGE_FILE_NAME, // renaming,creating,deleting a file &BytesReturned, // bytes returned NULL, // overlapped buffer NULL // completion routine ); CString filename = m_dir + "\\"+ CString(Buffer[0].FileName).Left(Buffer[0].FileNameLength / 2); switch(Buffer[0].Action) { case FILE_ACTION_ADDED: printf("%s\n+: %s\n","Triggered by add", filename); break; case FILE_ACTION_REMOVED: printf("%s\nx: %s\n","Triggered by removed", filename); break; case FILE_ACTION_MODIFIED: printf("%s\nm: %s\n","Triggered by modified", filename); break; case FILE_ACTION_RENAMED_OLD_NAME: printf("%s\n%s -> %s\n","Triggered by rename", filename, CString(Buffer[1].FileName).Left(Buffer[1].FileNameLength / 2)); break; case FILE_ACTION_RENAMED_NEW_NAME: printf("%s\n -> %s\n","Triggered by rename 2", filename); break; } } CloseHandle( hDir ); return 0; } ---------------------------------------------------------------------------------------------------- Output for Regular rename: Triggered by rename c:\scripts\3.txt -> Triggered by modified m: c:\scripts\4.txt Output for Add then Rename: Triggered by add +: c:\scripts\5.txt Triggered by modified m: c:\scripts\5.txt Triggered by modified m: c:\scripts\5.txt Triggered by rename c:\scripts\5.txt -> Triggered by modified m: c:\scripts\6.txt Tag: Visual C++ General Access violation after porting project to VC2005 Visual C++
  - 2
    - invalid or corrupt file: duplicate COMDAT error encountered while migrating to Visual Studio 2005 I have a solution comprising of some 20+ projects, which I am trying to migrate to VS2005 (I was using VS2002). One of the projects is throwing up this linking error: fatal error LNK1179: invalid or corrupt file: duplicate COMDAT <mangled form of the function CXYCollection::get_Count> (Basically the mangled name of the function just after QueryInterface) The project makes a heavy use of class templates and I think it is the reason behind the error. I am providing excerpts from the relevent source and header files, so that the design of the code, inheritance hierarchy, etc could be understood. Contents of XYCollection.h class CXYCollectionEventsBase { public: CXYCollectionEventsBase(IXYCollection *coll, IXYCollectionListener *clis) : m_Collection(coll), m_Listener(clis) {} // IXYCollection HRESULT AddListener(/* [in] */ IXYCollectionListener *lis); HRESULT RemoveListener(/* [in] */ IXYCollectionListener *lis); protected: void FireElementAdded(IUnknown *elem); // other protected functions ListenerCollection<IXYCollectionListener> m_Listeners; IXYCollection *m_Collection; IXYCollectionListener *m_Listener; }; (IXYCollection, IXYCollectionListener are COM interfaces which implement IDispatch) // Itf is derived from IXYCollection template<class Itf, const IID *iid, class ElemItf, class KeyItf, class K, HRESULT ( __stdcall KeyItf::*const KeyFn)(K*), const bool clearAllowed = true, class Base = IDispatchImpl<Itf, iid> > class CXYCollection : public Base, public CXYCollectionEventsBase { public: typedef CXYCollection<Itf, iid, ElemItf, KeyItf, K, KeyFn, clearAllowed, Base> _MyT; CXYCollection(IUnknown *parent, IXYCollectionListener *lis = 0) : CXYCollectionEventsBase(this, lis), m_Parent(parent) {} ~CXYCollection() { std::for_each(m_Elements.begin(), m_Elements.end(), mem_stdcall_fun(&ElemItf::Release)); } // The contained elements typedef std::vector<ElemItf*> Elements; typedef typename Elements::iterator ElemIter; // IUnknown STDMETHOD_(DWORD, AddRef)() { return m_Parent->AddRef(); } STDMETHOD_(DWORD, Release)() { return m_Parent->Release(); } STDMETHOD(QueryInterface)(REFIID riid, void **ppUnk) { // code has been removed ... } // Itf STDMETHOD(get_Count)(/* [out, retval] */long *numElems); STDMETHOD(GetItem)(/* [in] */ long index, /* [out, retval] */ IUnknown **item); STDMETHOD(Item)(/* [in] */ long index, /* [out, retval] */ ElemItf **elem); STDMETHOD(Find)(/* [in] */ K key, /* [out, retval] */ ElemItf **elem); STDMETHOD(Add)(/* [in] */ ElemItf *elem); STDMETHOD(Remove)(/* [in] */ ElemItf *elem); // ... and several other function definitions inherited from itf protected: virtual bool AddElem(ElemItf *elem); bool RemoveElem(ElemItf *elem); static bool KeyCompare(long l, long r) { return l == r; } static bool KeyCompare(BSTR l, BSTR r) { return l && r && !wcscmp(l,r); } static void KeyDestroy(long) {} static void KeyDestroy(BSTR b) { SysFreeString(b); } Elements m_Elements; IUnknown *m_Parent; // ... and some other variables ... }; Contents of XYCollection.cpp Code for the functions of the class CXYCollectionEventsBase Places where the template XYCollection is used: Contents of XYTSPids.h #include "XYCollection.h" typedef CXYCollection<IXYMNs, &IID_IXYMNs, IXYMN,ITSCVPidComponent,long, &::ITSCVPidComponent::get_Pid, false> CXYMNsColl; class CXYTSPids : public CXYMNsColl { public: CXYTSPids(IUnknown *parent, IXYCollectionListener *lis = 0); // IXYMNs STDMETHOD(Find)(/*[in]*/ long pid, /*[out,retval]*/ IXYMN **res); protected: struct COrdPid; bool AddElem(IXYMN *pid); }; Contents of XYTSPids.cpp file Implementation of CXYTSPids Contents of XYSections.h file #include "XYCollection.h" class CXYSectionsBase : public IDispatchImpl<IXYSections, &IID_IXYSections> { // IXYSections STDMETHOD(FindHash)(/* [in] */ long hash, /* [out, retval] */ IXYSection **sec); STDMETHOD(FindAccessKey)(/* [in] */ long upper32, /* [in] */ VARIANT low64, /* [out, retval] */ IXYSection **sec); }; typedef CXYCollection<IXYSections, &IID_IXYSections, IXYSection,IXYSection, long, &IXYSection::get_Section, false, CXYSectionsBase> CXYSections; Contents of XYSections.cpp file // Implementations of the functions of CXYSectionsBase ... I would be higly obliged if the pros out here can provide me some solution to this problem, which has crept in after I compiled the solution in VC2005. Tag: Visual C++ General Access violation after porting project to VC2005 Visual C++
  - 3
    - createprocess Look at the CreateProcess documentation. Most of the pointer parameters can be NULL but not all of them. Tag: Visual C++ General Access violation after porting project to VC2005 Visual C++
  - 4
    - mystery.c how does this work hey how can explain me how is this freaky program working this is alien stuff Code Snippet #include <stdio.h> main(t,_,a) char *a; { return !0<t t<3 main(-79,-13,a+main(-87,1-_, main(-86, 0, a+1 )+a)):1,t<_ main(t+1, _, a ):3,main ( -94, -27+t, a )&&t == 2 _<13 main ( 2, _+1, "%s %d %d\n" ):9:16:t<0 t<-72 main(_, t, "@n'+,#'/*{}w+/w#cdnr/+,{}r/*de}+,/*{*+,/w{%+,/w#q#n+,/#{l,+,/n{n+\ ,/+#n+,/#;#q#n+,/+k#;*+,/'r :'d*'3,}{w+K w'K:'+}e#';dq#'l q#'+d'K#!/\ +k#;q#'r}eKK#}w'r}eKK{nl]'/#;#q#n'){)#}w'){){nl]'/+#n';d}rw' i;# ){n\ l]!/n{n#'; r{#w'r nc{nl]'/#{l,+'K {rw' iK{;[{nl]'/w#q#\ n'wk nw' iwk{KK{nl]!/w{%'l##w#' i; :{nl]'/*{q#'ld;r'}{nlwb!/*de}'c \ ;;{nl'-{}rw]'/+,}##'*}#nc,',#nw]'/+kd'+e}+;\ #'rdq#w! nr'/ ') }+}{rl#'{n' ')# }'+}##(!!/" ) :t<-50 _==*a putchar(a[31]):main(-65,_,a+1):main((*a == '/' )+t,_,a\ +1 ):0<t main ( 2, 2 , "%s" ):*a== '/' ||main(0,main(-61,*a, "!ek;dc \ i@bK'(q)-[w]*%n+r3#l,{}:\nuwloca-O;m .vpbks,fxntdCeghiry" ),a+1);} Tag: Visual C++ General Access violation after porting project to VC2005 Visual C++
  - 5
    - Linker Error Hi , Thank you very much for the detailed informations. Tag: Visual C++ General Access violation after porting project to VC2005 Visual C++
  - 6
    - Converting System::String to LPCWSTR I've been looking for a long time as to how to solve this, and eventually just thought I'd ask. I've been told of A2W, which apparently cannot convert from System::String (so says the compiler error), I've tried converting to a wchar_t first, but the method won't accept it, and I'm running out of luck. Here's what my code looks like now. pin_ptr<const wchar_t> wch = PtrToStringChars(fileName); IAVIFile *aviMedia = NULL; IAVIStream *aviStream = NULL; AVISTREAMINFO *aviSInfo = NULL; AVIFILEINFO aviFInfo; LONG bufferSize = NULL; DWORD length = NULL; wchar_t wcFileLoc; Single vidLength; AVIFileInit(); wcFileLoc = (wchar_t)wch; Error---> AVIFileOpen(&aviMedia, &wcFileLoc, OF_READ, NULL); AVIFileInfo(aviMedia, &aviFInfo, sizeof(AVIFILEINFO)); length = aviFInfo.dwLength; vidLength = (Single)length; In simple terms, I'm trying to put fileName into the second argument of AVIFileOpen, which says it takes an LPCWSTR. Tag: Visual C++ General Access violation after porting project to VC2005 Visual C++
  - 7
    - Loop misalignment I don't know processor architecture very well but I am familiar with the concept of alignment, even for processors that existed before the 8008 (I think that existed before the 8080). I don't recall instructions requiring alignment but I could be wrong. I know that data alignment was relevant and is still relevant; have you seen the article Windows Data Alignment on IPF, x86, and x64 If alignment of instructions is useful, then I would be surprised if VC neither uses it automatically nor supports it's use somehow. I think that if you can't find a way to use it using an option that VC provides, then it is not useful to try to use it yourself. Are you sure that instruction alignment makes a difference Tag: Visual C++ General Access violation after porting project to VC2005 Visual C++
  - 8
    - Visual Studio 2005 - C++ - Using structures and vectors together. Maybe it's just too early in the morning, but I don't quite understand. Could you give me an example of what you posted please Earl Tag: Visual C++ General Access violation after porting project to VC2005 Visual C++
  - 9
    - cannot find dll First, be sure that it actually is your DLL that is not found in other systems. It could be that a runtime DLL or something else is not found and if so then the problem and solution is different. Since it says that your DLL is " not a valid COM or .NET reference " then you have a DLL that is often called a regular DLL. Are you familiar with path environment variable Your DLL needs to be somewhere that Windows can find it. One of the common places to put regular DLLs is in a directory that is listed in the path environment variable. Tag: Visual C++ General Access violation after porting project to VC2005 Visual C++
  - 10
    - regcure I was looking at my scheduled task for my laptop and I came across regcure as one of them. I have no idea what this is or what its suppose to do. Anyone have the answer Tag: Visual C++ General Access violation after porting project to VC2005 Visual C++
  - 11
    - PLease HeLp Hi All, i have got the following error , eerror LNK2001: unresolved external symbol _getaddrinfo@16 Debug/pro.exe : fatal error LNK1120: 1 unresolved externals please note that i have also linked my project with "wsock32.lib" "....i am using MSVC 6.0 with SDK for Windows Server 2003 with SP2... Thanks Anand Tag: Visual C++ General Access violation after porting project to VC2005 Visual C++
  - 12
    - Parsing/errorcheck. Isn't that code C# or is C++ using some C# code now I made a method called testing and placed all that code in there and called it from the main and it blasted out all sorts of errors not recognizing console, and saying catch needed just one argument, and parse was not a part of global namespace, etc. Tag: Visual C++ General Access violation after porting project to VC2005 Visual C++
  - 13
    - Identifcation and access of variables from strings Hi Sdi Thanks for the information which gets me part of the way there. The remaining difficulty, I think, is that having got hold of the strings from the edit boxes, how to use them, in the code, to access the model variables Regards David Tag: Visual C++ General Access violation after porting project to VC2005 Visual C++
  - 14
    - ifstream issues - reading in a data file For the purpose of a common terminology, let's say that each line consists of tokens separated by whitespace. In this situation, whitespace probably consists of one or more spaces but the term whitespace is common and relevant here. Assuming that, other than the name, the number of tokens per line is constant, then you can simply count the tokens and when the count is greater than a specific amount, you know the number of additional tokens in the name. Or you could remove tokens beginning at the end and then after the specific number of tokens you can assume the remainer (beginning of the line) is the name. Tag: Visual C++ General Access violation after porting project to VC2005 Visual C++
  - 15
    - Visble Clip bounds in a Graphics object I have created a Graphics object using Graphics(HDC *hdc) constructor. In this case how does the graphics object knows about the Visible region of the window. It does knows that other wise how does it can implement GetVisibleClipBounds function. In my case if after the creation of the Graphics object the window is resized i.e. the visible region is changed, anything drawn on the new found area is not actually drawn. As far as i can see the visible region is not getting updated in the Graphics object, can anyone help me with this. Will appreciate it Samit Tag: Visual C++ General Access violation after porting project to VC2005 Visual C++
  - 16
    - _stat() and long names There is a lot of legacy code, which is used _stat structure... Also, by some reason, GetFileAttributesW not works with long names to... Same problem with FindFirstFileW -- it searches something like "\\ \c:\Workspace\test\q" but not searches \\ \c:\Workspace\test\qqqqq...[total 320 q] ... Tag: Visual C++ General Access violation after porting project to VC2005 Visual C++
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  - 1
    - How to disable hot tracking on a CButton control? Sdi wrote: What does the debugger say about WM_MOUSEMOVE and related mouse messages What do you mean by that I'm a newbie MFC programmer with only a month's worth of experience. All I know is that I have a form I made using the resource editor that has several buttons on it that I dragged from the toolbox. They highlight when I mouse over them. I'm just trying to stop the highlighting. Thanks for your help. ~Eric Tag: Visual C++ General Access violation after porting project to VC2005 Visual C++
  - 2
    - ATL IDispEventSimpleImpl reverse order bug still present in VC++ 2005 ???? Just to let you know that I've tried to access an Excel 2003 application and listen to events fired from it (as described in KB288724) all with Visual 2005, and....it works well. The parameters are passed in right order, as they should be. So I don't understand why my application is receiving parameters in reverse order for all events with more than one parameter. Even if I do not have access to the COM server source code, I highly doubt that implementation be wrong for all event firing....... Anyway, I think that I'm not going to post any bug into connect site. Thanks for your support. Tag: Visual C++ General Access violation after porting project to VC2005 Visual C++
  - 3
    - Link error : debugging information corrupt Hi I have a VC6 application which uses gdiplus When i build the pjt the following link error occurs gdiplus.lib(imagingguds.obj) : fatal error LNK1103: debugging information corrupt I have the latest platform sdk installed and i was able to use the gdiplus in my other vc6 projects Plz help Regards Tag: Visual C++ General Access violation after porting project to VC2005 Visual C++
  - 4
    - error LNK2019: What .lib do i need to link? (C) No, the DLL only has to be in your working folder. It is almost always a bad idea to put it in the system folder (pollution). Btw, if your program doesn't link that has nothing to do with the location of the DLL. Now that you added the lib file to your additional linker input in your project settings, is the error code still the same Because if the error is that the linker cannot find the lib file, you have to also specify the location of the lib file in your additional include directories. Could you post the current linker error and your linker command line Tag: Visual C++ General Access violation after porting project to VC2005 Visual C++
  - 5
    - mfcs80u.lib(dllmodul.obj) : error LNK2005: _DllMain@12 Hi, I have the same problem. I said what you have to do, get rid of the function DllMain. The MFC uses DllMain to do initialisation of the MFC for you to use so you need to make sure you don't use MFC. To do what you said,I put the part that concern Dll Main in comment.and i have 0errors and 0 warnings,and thank you for that.I hope that Mandan done like that.Now,the question is: remember that you can't use the DllMain entry point function since the MFC uses it, but you use other things to do the initialisation. How is that done Thanks. Tag: Visual C++ General Access violation after porting project to VC2005 Visual C++
  - 6
    - VS2005 / corrupt solution file / References to non existing projects Hi, I have a problem with a number of VS2005 solution files (converted from VS2003). The solution builds but VS keeps updating the solution file which requires a check-out etc. The problem is caused as far as I can see by references to non existing projects! The solution files have references (GUIDs) to project files in the GlobalSection(ProjectConfigurationPlatforms). However some of the references are not listed at the top of the solution file and I cannot find (text search) any project file with such a GUID. If I remove the references then VS adds new references (again to non existing projects). The solution we have contains both vcproj files but also icproj (Intell compiler) with nested vcproj files. Does anybody have an idea what might cause this problem OR Does anybody have suggestions for debugging this problem Thanks in advance TomFr Example: GlobalSection(ProjectConfigurationPlatforms) = postSolution {35A5CE92-181C-4238-965E-870A39BA8D8D}.Debug.ActiveCfg = Debug|Win32 {35A5CE92-181C-4238-965E-870A39BA8D8D}.Debug.Build.0 = Debug|Win32 ... ... {84F9DB36-A887-44F6-B3AA-520FE484DC3A}.Release.ActiveCfg = Release|Win32 <== Non existing Reference. {84F9DB36-A887-44F6-B3AA-520FE484DC3A}.Release.Build.0 = Release|Win32 EndGlobalSection Tag: Visual C++ General Access violation after porting project to VC2005 Visual C++
  - 7
    - Interesting fast interop problem einaros wrote: Ok, those are reasons good enough for me. This essentially means that you need a native container, with your own allocators as a basis, though. That's right. I'm still a bit worried about previous experiences with converting between managed and unmanaged types, and trouble passing longs, but you're definitely on the right page. My new container is showing *lower* CPU usage, but is causing more audio dropouts than when I was using the ArrayList. I can only assume this is due to thread locking, since the profiler reveals no bottlenecks, and overcoming a previous problem like this had a dramatic effect. I sure hope I'm right as I embark on all this work, although this is only a hobby project and you only learn by challenging yourself, so... einaros wrote: I wouldn't be that quick to blame C++ (or C++/CLI, to be exact) ref class Foo { public: Foo^ next; }; Foo^ f = gcnew Foo(); f->next = f; LOL yes, it's all coming back to me. Thanks for the refresher! einaros wrote: What you could do is write native C++ code for the container itself, including all time-critical operations and native memory handling, and follow up by creating a middle tier in C++/CLI. In the C++/CLI code you can call into the native container to insert / extract data, utilize the container management functions (e.g. sort), and so forth. The C++/CLI tier should also do any necessary conversion needed between managed and unmanaged types. That almost sounds like a plan! I think I can see how it will work now: value class fastList { ... } this inside a managed wrapper that compiles a DLL (I use Express so no direct interop) ref class managedFastList { ... } with typed (or at least managed) operators and an enumerator to do the job of stepping through list nodes. Thanks so much for your help, you're the greatest! If this is successful I'll add you to the contributors list. http://sourceforge.net/projects/buzz-like Tag: Visual C++ General Access violation after porting project to VC2005 Visual C++
  - 8
    - BackupRead "Access denied" Problem (and backing up files in general) Comment from MSDN: a backup application must have access to the system-level access control settings , the ACCESS_SYSTEM_SECURITY flag must be specified in the dwDesiredAccess parameter value passed to CreateFile . Tag: Visual C++ General Access violation after porting project to VC2005 Visual C++
  - 9
    - sort of CListCtrl Thanks a lot, Prasad OK, very helpful to me. Tag: Visual C++ General Access violation after porting project to VC2005 Visual C++
  - 10
    - Wrapper Hi einaros, Thanks for your help, now I seem to have must clearer view. Anyway, I went to bought a book title call Pro Visual C++/CLI and the .NET 2.0 Platform by Apress for self-learning. Any more recommended books if I want to learn more in depth. Regards, Jimmy. Tag: Visual C++ General Access violation after porting project to VC2005 Visual C++
  - 11
    - please help me---I cannot import VBE6EXT.olb I developed the addin in MS word 2003 using VC++ 2005+ATL. I cannot solve the problem for three days: when I compile: It says: error C4772: #import referenced a type from a missing type library; '__missing_type__' used as a placeholder. The error is in here: #import "C:\Program Files\Common Files\Microsoft Shared\VBA\VBA6\VBE6EXT.olb" rename_namespace("VBE6") BUT the file( VBE6EXT.olb ) exactly is in the file. I have no any clue how to solve it. I searched a lot through google. But there is not any help. Tag: Visual C++ General Access violation after porting project to VC2005 Visual C++
  - 12
    - Combobox 1) If u would like to add data to combo at the design time itself,go to it's properties,select 'Data' Column Yes' this is what I want, but this Data column is in "disable" status (gray color), so I can write there strings.. the dialog Messages empty, I can' t see the regular look..maybe It's connected to this problem to. 2) I'm thinking maybe it will be better to take this date/time column from the database as date and not as string, then format this something like: CString strDate; taskDate; rs.GetFieldValue("task_date",taskDate); strDate = taskDate.Format(_T("%d/ %m/ %Y")); my problem is, How to define taskDate Tag: Visual C++ General Access violation after porting project to VC2005 Visual C++
  - 13
    - Allocation problem The reason I say the problem might be that memory is being written to that should not be is because "the error is in the CheckBytes(...) function". My guess is that since it is the CheckBytes function, it is nearly certainly the problem I describe. The purpose of the CheckBytes function is to catch errors such as that. Tag: Visual C++ General Access violation after porting project to VC2005 Visual C++
  - 14
    - Error PROJ003 -- Error Spawning cmd.exe Yes. There are a lot of people with similar problems, but I don't see any good solutions shown there. I am OK with just getting a "quick and dirty" solution. I think the build is generally successful except for the last step of embedding the manifest information. One person suggest putting the cmd.exe file somewhere in the path of the VS 2005 build: " A Q&D fix is to copy c:\windows\system32\cmd.exe into the vc\bin folder of your VCE installation folder. " Is the bin folder a reasonable Q&D solution or could there be problems with this I'm hoping this will work and will have a chance to try it a little bit later. Tag: Visual C++ General Access violation after porting project to VC2005 Visual C++
  - 15
    - Why no compilation error - Assigning int to std::string? Hello, I am sure I am missing something or may be I don't understand it properly but can somebody explain me why first line results into compilation error but second does not: Code Snippet std::string tmp_Error = 5 ; // Results in C2440 error std::string tmp_noError ; tmp_noError = 5 ; // No compilation error Thanks and Regards Yogi Watcher Tag: Visual C++ General Access violation after porting project to VC2005 Visual C++
  - 16
    - Asunchronous UI updating - other way? In my application, I receive some values from two threads; I have main class of main form, that is one thread TH1 that receives some events like button click and second thread TH2 that works in loop generates some values. When some value or action is received from TH1 or TH2, they both need to be displayed in a control in main form. If I try to change control from TH2, get an exception about cross-threading operation. I have solved that in the way that TH2 doesnt change controls but only properties in main form and in main form I have timer that every 1ms updates labels from properties. Works, no cross-therading troubles. Although I don't like this timer that works all the time, I wanted to make maybe some asynchronous event running - that TH2 would just fire some event in main therad and it would update interface. But I dont know how to do this. How When I tried to make some BackgroundWorker that would br run every time a property changes, it didn't change interface, just has thrown A first chance exception of type 'System.InvalidOperationException' occurred in System.Windows.Forms.dll How to force main window to update its controls in its own thread (I think that I just don't know how to implement those events) Tag: Visual C++ General Access violation after porting project to VC2005 Visual C++

RiskSrv

I have an application that used to work fine compiled with VC2003. Recently I re-compiled it with VC2005 and it started getting access violations.

Application has 2 dlls that and one of them creates instance of std::map which it than passes to the other dll. I can see contents of the map in the debugger after and it looks fine. However when that second library calls map::begin() result returned from that function looks completely bogus and not at all points to the first element (or any other element) in the map.

Can this be caused by different versions of STL used to compile each library

The map in question is only accessed by a single thread so it's unlikely to be some race condition.

Re: Visual C++ General Access violation after porting project to VC2005

Damien Watkins - MSFT

Hello

Re: Access violation after porting project to VC2005

So did you rebuild all the files after porting I am not sure what the part about ��different versions of the STL�� means here

Thanks

Damien

Re: Visual C++ General Access violation after porting project to VC2005

TilakGopi

Can this be caused by different versions of STL used to compile each library

Do u mean that the dlls also need to be built again in VS2005 I too guess so,it may solve the problem(to be frank i don't much about compilation and all, but i just exposed my idea,that's it.Don't mind,if my idea is faulty.

Thanx,

Ch.T.Gopi Kumar.

Re: Visual C++ General Access violation after porting project to VC2005

Damien Watkins - MSFT

Hello

I would first recompile everything and see if your problem disappears.

Thanks

Damien

Re: Visual C++ General Access violation after porting project to VC2005

RiskSrv

I rebuilt all files after porting and before posting this message.

Turned out the issue was caused by a race condition that freed my stl datastructure from different thread. It was exposed by porting to 2005 but had to be fixed anyway.

Thanks for your helf and sorry for the false alarm.