Hi all,

Am making a game in C++ with OpenGL (and OpenAL for sound & DevIL for image handling) for a Uni. assignment.

Everything had been fine so far, until I just tried to run my game in 'Release' mode as opposed to the usual 'Debug'. And *bham!*...the program crashed with an error before I even get to the main menu.

The error I receive is :
"Unhandled exception at 0x0377a110 in lesson1.exe: 0xC0000005: Access violation writing location 0x00000120."

If I choose to 'Continue', I keep getting the same error message.

By choosing 'Break', the program points me to the following line in a file called "msize.c" :

#endif  /* _WIN64 */
 -->          retval = (size_t)HeapSize(_crtheap, 0, pblock);
Here's part of the disassembly it points to :

    #endif  /* CRTDLL */
            else    /* __active_heap == __SYSTEM_HEAP */
    #endif  /* _WIN64 */
                retval = (size_t)HeapSize(_crtheap, 0, pblock);
    00413759  push        ebx  
    0041375A  push        edi  
    0041375B  push        dword ptr [__crtheap (45748Ch)] 
    00413761  call        dword ptr [__imp__HeapSize@12 (42C1A4h)] 
--> 00413767  mov         esi,eax 

            return retval;
    00413769  mov         eax,esi 

    0041376B  call        __SEH_epilog4 (411745h) 
    00413770  ret              
I don't understand what's going on at all, and since this is for a Uni. assignment, my lecturer has specified that the game should run as expected under both 'Debug' and 'Release' mode.

ANY advice/solutions are gladly welcome, because I'm rather desparate now after having spent over a day debugging and searching on the internet.

Thanks heaps in advance!