Deleting All Master Data for a specific location in APO

We have an APO system that is not connected to any ECC system. I am trying to delete all the data for a specific plant location.

I managed to delete all the transaction data (so I thought), and master data (PDS, Transportation lane, resources, etc).

Then I could mark the product-location for deletion. When I ran the deletion job, it cleaned up almost all the product-location excepting for a few.

When I checkd the reason using WUF for one product-location, there were soem LC Orders. In RRP3 they showed as Receipt elements with Category PrdRes(W) and were way in the past in 2008. I tried to delete them in RRP3 and the message I got was 'No valid orders selected for deletion'.

NOne of these orders appear in /SAPAPO/RLCDELETE and in transaction /SAPAPO/SDORDER_DEL. I also tried OM17 thinking that these orders are in the dB but not in liveCache.

Has any one faced this problem? Could someone pl. help me?

Thanks

Ryan