Lets start from the beginning.
Did you customize residence times for all document types that are in use?
Had you ever archived POs before?
what release you are running?
In the ERP system the archiving programs are usually the reports RM06EV70, RM06EW70 and RM06ED70, but I can see that your are ending with 47
Have you taken care that you have the most recent OSS notes for MM_EKKO implemented?