Hi @SHOES_ ,

      We ran into the same error with reversals. We had a payout that was made for the wrong amount and received the same error when attempting to reverse it. I later found it also occurs with cash sales. I found a workaround that allowed me to reverse the transactions, including credit card receipts.

1) Click 'Reports', go to 'Sales', then select 'Detail'.

2) Adjust the date range, if needed, then find the receipt number in the report that you need to reverse.

3) Double click on the Receipt #. This should open a new receipt details window. (Screenshot attached)

4) Select 'I Want To...' from the top left corner then select 'Reverse Receipt'.  (Also in screenshot).

5) Once it is reversed the receipt details you are in will show the line items in red and 'Return' in the bottom right by the receipt amount.

Once I reverse them from this report, the normal Sales History view shows the transactions reversed. If you have a payout you need to reverse, the receipt details window will be blank, but the 'Reverse Receipt' option still works.

I hope this helps you as well. 

-Joshua