Call it a compiler error - I moved one call from the constructor of the class over to an initialiation routine, and voild, it works.
Regards Thomas Tomiczek THONA Consulting Ltd. (Microsoft MVP C#/.NET) -----Original Message----- From: Thomas Tomiczek Sent: Dienstag, 16. April 2002 17:35 To: [EMAIL PROTECTED] Subject: [DOTNET] Anyone knows what causes NullReferenceException in __CxxCallUnwindDtor? (unmanaged C++, called from managed C++) Hi, I am just trying to constrcut com objects (A com object, actually) manually without the registry keys being present :-) This is done thorugh a factory method, just "creating the object" with new in managed C++ (Actually with __nogc new) The object in question is a Csource inheriting class (DirectShow Filter), and in its constructor it is creating an object with a class inheriting from CSourceStream (as output pin). Now, when I single-Step this, I get an exception in the constructor of this pin, and MY code for this is extremely simple - actually ust calling the base constructor. The error in question is even more helpless: System.NullReferenceException: Object reference not set to an instance of an object. at __CxxCallUnwindDtor(IntPtr , Void* ) at DataSource.__ctor(DataSource* , SByte* pName, IUnknown* lpunk, Int32* phr) in c:\#work\quadra\quadra.videophone\quadra.videophone.conferencing.filters \datasource.cpp:line 98 at Quadra.Videophone.Conferencing.Filters.Factory.CreateDataSource() in c:\#work\quadra\quadra.videophone\quadra.videophone.conferencing.filters \factory.cpp:line 21 at Quadra.Videophone.Terminals.VideoRenderTerminal.OnConnect() in c:\#work\quadra\quadra.videophone\quadra.videophone.terminals\videorende rterminal.cs:line 68 Anyone has any idea what this means? I never heard of __CxxCallUnwindDtor. Regards Thomas Tomiczek THONA Consulting Ltd. (Microsoft MVP C#/.NET) You can read messages from the DOTNET archive, unsubscribe from DOTNET, or subscribe to other DevelopMentor lists at http://discuss.develop.com. You can read messages from the DOTNET archive, unsubscribe from DOTNET, or subscribe to other DevelopMentor lists at http://discuss.develop.com.
