cls files could not be loaded inside VB project

Question

Hi,

I am facing an issue while opening an existing VB project. It says 'c:...\test.cls' could not be loaded even though the file is present in the given location. Similarly it throws the same error for .ctl and frm files as well. I am not an expert user of VB (6.0). Can some one throw some light on this. In which case .vbp will not be able to load .cls files that are present in the given locations

Thanks