Using RMS Verion 2.0. I used the Store import to import a liquor database. Lots of Parent/Childs. I had an item that was linked back to itself, the parent item had the same lookup as the child. We didn't catch the mistake until they scanned the item at the point of sale. One time it let us go all the way through the sale, take a payment and then we got Error 28 and the point of sale shut down. The transaction was never recorded. Another time, when we scanned the item we immediately got Error 6 overflow. It locked up the system and we had to Ctrl-Alt-Del to get out of the error loop. Another time, when we scanned the item we immediately got Error 5 invalid procedure. It locked up the system and we had to Ctrl-Alt-Del to get out of the error loop. Just thought I would post here because I couldn't find any info about these errors or what could be causing them.