Here is flow to test
Run following in your browser by providing pw_order_id and new_run=1, where new_run=1 means to reset order and all its items to Status = New
http://prima2go.com/3dcpwupdates/run-test.php?pw_order_id=204044&new_run=1
you will see the logs what it is doing
then you can run it without new_run=1, so it doesn't reset status to New to check it again as
http://prima2go.com/3dcpwupdates/run-test.php?pw_order_id=204044
and now it shouldn't show any log if order is already completed