TDP0498 action IS ALREADY IN EFFECT FOR FORCE "name"
Explanation:
A MODIFY FORCE command has failed because the displayed NAME is currently in use by a previous FORCE command.
Generated By:
TDP.
Remedy:
Either re-issue the command specifying different NAME, specify no NAME so allowing TDP to generate a unique one, or use the MODIFY command to delete the existing FORCE NAME the re-issue the command.