Problem:
Unable to debug C and COBOL programs at the same time -- why?
Resolution:
This is expected as you can only use on hard mode/low-level debugger at a time in Windows. Both Visual Studio and Net Express use the low-level debugging support i.e. they conflict.
Your options to get around this are:
1) Debug the C in Visual Studio and run the COBOL.
2) Run the C from Net Express (Animate Settings) and debug the COBOL.
3) Run the C from the command line and use CBL_DEBUGBREAK.
Alternatively, you could switch to .NET where you can have the C and COBOL mixed together within Visual Studio as managed code.
