Down Chunk

Is there a way to drop a down chunk from a dbspace which has only one chunk? The down chunk is a cooked file which has been removed from the file system. When I tried to drop the dbspace which contains only one chunk, onmonitor returns with an error (ISAM error: Unexpected internal error). I have also tried to drop the dbspace using onspaces, but onspaces does not allow you to drop a chunk which comprises an entire dbspace (as is in this situation). I do not have a backup to recover to and this down chunk prevents making backups of the database using ontape. Any suggestions? Steve skwong@wcb.bc.ca