fetch cleartext error - No permission match

After restore VOBs to another ClearCase server, some VOBs reported the following error message when trying to access (read) the contents.
...
fetch cleartext view=BUILD_CBFE13.3_d vob=/vobs/MidTier dbid=0x16f - No permission match
fetch cleartext view=BUILD_CBFE13.3_d vob=/vobs/MidTier dbid=0x173 - No permission match
fetch cleartext view=BUILD_CBFE13.3_d vob=/vobs/MidTier dbid=0xdf - No permissi match
...

A "cleartool desc" command found out that the original additional group cbfedev disappeared. To add the additional group, "cleartool protectvob -add_group" command ran without error. However the result showed that the additional group was not added to the VOB.

Solution.

$ cd /ccstorage/vobs/MidTier.vob
$ cd .identity
$ ls
gid group.500 uid
$ rm group.500
rm: group.500: override protection 410 (yes/no)? y
$ cleartool protectvob -add cbfedev /vobs/MidTier

Run "cleartool desc" again, the result showed that the group had been added to the VOB. And the fetch cleartext error was gone as well.

$ cleartool desc -l vob:/vobs/MidTier
...
VOB ownership:
owner cbfedev.cibc.com/ccadmin
group cbfedev.cibc.com/clearcase_cbfe
Additional groups:
group cbfedev.cibc.com/cbfedev
...