Any ideas what may be causing the (see attachment) error? The error is happening at

'-- Retrieve the global preferences
SFSPreferencesBO.RetrieveSecurityPreferences()

in AppMain.

The application uses CustomDataSerializtion, compression, and encryption. I've checked the encryption keys and vectors in the application and on the server and they match. It's only two application (data sources) that are having a problem. Other applications are running fine with ES. The application runs if I remove the ES connection and connect directly to the database.

-Larry

Hrm, that's odd.  Although it could be that if the assemblies weren't in the GAC, the different versions of VS might have different pathing to the referenced assemblies and the wrong version might have been brought in.  If the two versions don't line up, the sequence of data written to the stream would be different than the sequence of data expected to be read from the stream on the other end, and you would receive all kinds of errors, such as the end of stream exception you got.