I'm developing an add-in for VS.NET 2003 that automates the building of
the various solutions I'm responsible for.

I've got it so that it will properly loop over the array of solutions,
then open, clean (if necessary), build, and close each one in turn.
Except for one small problem.

When the add-in opens a project, I get an error message on *every*
solution--specifically, "Some of the properties associated with the
solution could not be read."

I've tried everything I can think of to fix this:

1.    I verified that Visual SourceSafe (6.0c) is the only registered SCC
provider on the system, and it is registered with a full path.
2.    I have unbound the solution and project from VSS, then re-bound it.
3.    I have removed the solution entirely, then opened it from source
code control.

None of these have worked.

Oddly enough, if I open the affected solutions manually (using
File/Open Solution or one of the MRU items), I do *not* get the error.

Any ideas?

Thanks in advance,
--M