Cygwin Debugger could not find files

[double]

I have switched to Cygwin, because "libc" did not work with MinGW.

Everything works fine, but the debugger could not find the source code files.

Error message:

Debugger name and version: GNU gdb 6.5.50.20060706-cvs (cygwin-special)
Cannot open file: C:\Cygwin\project\??\cygdrive\c\Cygwin\project\global\database.cpp

?? = \n\r (0x0d 0x0a)

Thank you very much
Markus