[CMake] Could not find GUID for target

[Shishir Ramam]

An attempt to use Cmake 2.0.5 to generate project files for Visual
Studio 8.0 fails with
"CMake Error: Internal CMake Error, Could not find GUID for target: my_file.c"

Any help in isolating the cause of this problem would be appreciated. 

TIA, 
-shishir