error when running cfgmgr cmd

Hi,
When inserted cd-drive run the cmd "cfgmgr" we are getting error
messeges as:
Method error (/etc/methods/cfgnam -l nampd0):
0514-068 Cause not known.
sh: /etc/methods/cfgnam: not found.

( or )for another it comes as:

ethod error (/etc/methods/cfglft -l lft0 ):
0514-032 Cannot perform the requested function because the
specified device is dependent on another device which
does
not exist.
Method error (/etc/methods/cfgnam -l nampd0):
0514-068 Cause not known.
sh: /etc/methods/cfgnam: not found.

previously it performed well when tried cfgmgr.Pls do let me know about
this.
Thanks,

.