Error message when slaves not working

[sanados]

currently i get those error messages:

root at srv079:/etc/mogilefs# /etc/mogilefs/trunk/utils/mogtool --domain 
files --tracker 127.0.0.1:7001 extract new_motd test.motd
Error: Something went wrong
MogileFS backend error message: failure Operation failed

root at srv079:/etc/mogilefs# /etc/mogilefs/trunk/utils/mogtool --domain 
files --tracker 127.0.0.1:7001 lo new_motd
Error: Something went wrong
MogileFS backend error message: failure Operation failed


after some debugging i found out that this occured by reading the pathes 
from the database.
Furthermore this is the error message when trying to read the paths from 
the slave but the user has no rights to access the tables;

Perhabs you could adjust the error message to something that would give 
a hint about the problem!

thx
 Jürgen