Diagnosis
The logical database used to create the InfoSet has been changed and isincompatible. The table specified in the error message has been deletedfrom the tree. However, this table is still analyzed by queries usingthis InfoSet.
The InfoSet cannot be used or regenerated as long as there are stillqueries which analyze the table in the tree.

Procedure
By choosing Goto -> Query directory on the initial screen forInfoSets, find out which queries of the InfoSet use the table inquestion and either delete these queries or change them so that thetable is no longer used. You can then try to change or generate theInfoSet again.