Hi Kirk,
just to let you know, I manage to scan the whole disk now, and as I suspected, the problem I had has to do with empty folders. I deleted all empty folders and was able to scan multiple folders at a time, but every time the scan found an empty folder I miss in the batch of folders I was trying to scan it would halt the scan and I had to terminate the process with task manager and find the empty folder to delete it and then it would work fine.
Do not know if it is a PM bug or a bug in my system. But is clear to me this is the problem.
Just wanted to let you know. Thanks