This error has the following causes and solutions:
The registry strings used to find the source code control provider dynamic-link library--for example, Ssscc.dll--are not correct, or you have the wrong version of Visual Basic, or the file Ssscc.dll is missing.
You moved the source code control folder after running Setup without updating the registry.
The Setup program failed.
Check your source code control provider's setup instructions.
Rerun the Visual SourceSafe Setup program.