Problem: Geodatabase to Coverage tool hangs with "Working" status dialog box on screen
When performing a batch conversion using the Geodatabase to Coverage wizard, the "...Working..." progress dialog appears and hangs. You must use the Task Manager to close the tool (ArcCatalog closes with it).
This is a known issue. Fields in the the table at the bottom have been left blank. This is true for blanks left in output coverage cells or output subclass cells, or even an entire row left blank.
Solution or Workaround
Ensure each field has a valid value and is unique where necessary for every record in the batch table.