In my company, people used to work with Visual SourceSafe, but some years ago they decided to start working with GIT.
I started working here some months ago, and as such I've never set up a Visual SourceSafe environment.
While debugging dumps from older versions, this is giving problems: it seems that the dumps (taken using procdump) contain commands for retrieving source code, using Visual SourceSafe.
I've just installed Visual SourceSafe, and I was hoping that this would make it possible to get the older versions of the source code, but this is not the case. (For your information, even after having installed Visual SourceSafe, I don't see any SourceSafe information in Visual Studio's "Team Explorer - Connect" window)
(the original question contains quite some investigation information, which seems to be obsolete now that the answer of this question is known)
Unbelievable: the issue is caused because the SourceSafe installation seems not to be complete:
In order to get it working, the following needs to be done:
Add the SourceSafe directory to the $PATH$ environment variable (C:\Program Files (x86)\Microsoft Visual SourceSafe)
Create the $SSDIR$ environment variable in order for SourceSafe to know where to look for the source code (should refer to the directory, containing the srcsafe.ini file).