Why I got the message:"Cannot find module (LM-SENSORS-MIB): At line 0 in (none)",when using mib2c to generate c file?

[Hongjunli]

the whole message is as follow:
No log handling enabled - turning on stderr logging
Cannot find module (LM-SENSORS-MIB): At line 0 in (none)
writing to user.h
writing to user.c
running indent on user.h
running indent on user.c