When trying to access a specific area of Manual Data Entry, an error is received with a title bar which reads "btvdb".  The error reads: "Cannot perform this operation on a closed data set." The application continues to operate but the error message appears each time a new data field is selected. 

This error may be encountered if the Paradox database has developed errors or corruption within one or more individual tables used by Tracker. The corruption may be repaired using a standard retail version of the Corel Paradox program, Version 9 or later.

Using the Table Repair function, most common corruptions can be resolved with a minimum of effort or expertise.  However, individual tables must be searched or tested before corruption or errors can be positively identified.