There are a few reasons for this error; please try these in order:
1. A corrupt index, in which case try Tools > Reindex (or Reindex.exe if you
can’t open CostGuard).
2. Possibly a networking issue:
7010 Problem with Advantage server file read
Problem: The Advantage server was unable to read from the specified file.
Solution: Check the status of the network and repeat the command.
3. Less likely, an Administrator on a Windows Server went into Control
Panel | Administrative Tools | Computer Management and closed the Advantage
Tables opened in Shared Folders | Open Files. This action will cause the
client application to receive a 7010 error.