"Cannot open the specified table, ""%s"", because: %s""Cannot set list column s width.""Cannot delete all items from list control.""Cannot add column to list.""Cannot insert item into list.""Cannot set the text of an item in a list control.""Cannot delete column from list.""Cannot expand selected target database because: %s"
These messages occur when there is an error in loading tree control with source tables or columns of selected tables.
Refresh source database with "Refresh" button provided or reconnect source.