Visual COBOL Project contains .gs screenset files but these need to be packaged to one .lbr file.
When building the project the following error may be encountered:
File obj\x86\Debug\<Filename> could not be copied, as the file was not found.
All the screenset files present in the project , by default, would be marked as Build Action "none" in all the screenset file's properties.
Change this property to Build Action "content", at the next build attempt the .lbr file will be generated without no error.