Hello > when master gives a command to the slaves, they take data from the nfs > directory. They create a temp directory in /tmp and after finishing the > work, the results will be copied back to nfs directory. IMHO: the dir in the first line of the log does not exist or is not writable (disc full, NFS-permissions, typo ?). The rest looks like the code is removing a dir it is still working in. Bye