Whats the meaning of this

When I compile my program in release mode I get the following error message when the program starts:

Debug Assertion Failed!
Program.....
File: dbgheap.c
Line 1044

Expression _CrtIsValidHeapPointer(pUserData)

Whats the meaning of this error and what is my fault in the program so that the program will run?

Probably an uninitialized pointer (pUserData?).

How can I find the pointer where is not initalized?

The line where you assert is a good place to start.

Hit ALT+7 when the debug assertion poped up and take a look at the call stack. There you'll find the calling function (+line) easily.

Oliver.