ERROR: opening port for MGR MGR (Connection refused)

ggsci>start ext1
Sending START request to MANAGER ...
ERROR: opening port for MGR MGR (Connection refused).

Also when attempting to stop the manager the following error occurs


GGSCI> stop mgr
Manager process is required by other GGS processes.
Are you sure you want to stop it (y/n)? y

Sending STOP request to MANAGER ...
ERROR: opening port for MGR MGR (Connection refused).


Enter into dirpcs directory eg:/u01/gghome/dirpcs

mv mgr.pcm mgr.pcm.bkp

ggsic> Start mgr

ggsci>Start extract ext1