Looked at our Data Protector and now seeing this error 'Interprocess communication problem'. It continues to perform the scheduled backups correctly. There has been no change of names.
omnidbutil -show_cell_name gives the correct FQDN
E:\OmniBack\bin>omnisv status
ProcName Status [PID]
crs : Active [4140] mmd : Active [5352]
kms : Active [3008]
hpdp-idb : Active [2828]
hpdp-idb-cp : Active [1400]
hpdp-as : Active [6040]
omniinet : Active [5588]
Sending of traps disabled.
Will continue trying some of the things mentioned in previous posts.