The error means that LabVIEW has been disconnected from the database. There can be several causes, but the most common are that the database is corrupted or the Citadel Service has shut down or stopped. Please verify that you have the latest version of logos (4.4.0.15) by checking LKCITDL.EXE in the System32 directory. If you do have this, then please generate an email support request and send us your database.
Regards,
Michael Shasteen
Applications Engineering
National Instruments
www.ni.com/ask
1-866-ASK-MY-NI