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So basically I had set a breakpoint on a WINAPI function call. When I tried to run the program and step over the breakpoint, the program exits with the popup window: unknown exception code 6F4 (exc.code 6f4, tid 704). The function does not return any value as the program exits before that happens, so I can't tell if the function has returned a successful error code or not. What is this exception code, and why did this happen?

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  • Can you try to set the same breakpoint in x64dbg or in windbg and see if there is the same exception ? Try also to use an hardware breakpoint. – Tony Feb 18 at 11:01
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>cdb -c "!error 6f4;q" cdb | awk "/Reading/,/quit/"
0:000> cdb: Reading initial command '!error 6f4;q'
Error code: (Win32) 0x6f4 (1780) - A null reference pointer was passed to the stub.
quit:

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