smohyee: The PO was made in Quickbooks, not Method, but that shouldn't matter right?
That shouldn't matter.
smohyee: Any info you can provide about this error?
It took a little research but I think I found the source of your problems.
If you create a PO like this:
Type Qty Cost
Item 1 2 $10
Item 2 2 $10
Item 3 2 $10
Then try to do an item receipt in this order:
Type Qty Cost
Item 3 2 $10
Item 1 2 $10
Item 2 2 $10
You should hit the "LinkToTxn" error.
There was a post on Intuit's forums about the order of the POs and items receipts being important. My testing was only with one PO and one item receipt so I never hit this conflict. When I changed my item receipt to be out of order I hit this conflict everytime. Try it out in testing and you should find similar results.
To fix this conflict, whatever order you issue your POs - you need to create your item receipts in the same order. So if you did three POs - #1, #2 and #3, then your item recipet on those POs needs to be for PO #1, #2, #3 in that order - any deviation from that order on the item receipt and you'll get a conflict message.
Please post back if this helps.
~C