Stop During PsN

Dear all, I would very much appreciate it if you could help me solve the below problem. 1. During the running of PsN, I came across a problem where no computation takes place. After the usual conduction, during some step the process seemed to be stopped. Although for parallel processing the worker1 to worker5 directory was created, nothing followed Monitoring of Search in the OUTPUT, psn.lst file. This condition continued for 24 hours. I am not sure if this is a problem coming from the code or some errors with the computation system. Has anybody else come across a similar issue? 2. To reduce the hard disk burden I used -clean=3 in the scm process. However, after the process was stopped, it was impossible to resume the program using the statement -directory. Is it still possible resume the previous task? If so, how to? Repeating 13 rounds of problem is certainly something nobody want to do. Thanks a lot. -- Xinting