When raising a purchase invoice and using the get receipt lines function, if the invoice is posted in error - the "cancel" and "correct" options are disabled and the only option is to raise a corrective credit memo. When this is done the "invoiced value" on the posted purchase receipt is not cleared, which distorts the "Receipt not invoiced" value. The receipt can also not be applied to the new invoice. I would like to suggest two changes:
1. Enable the cancel/correction functions for this scenario.
2. If a credit memo is applied to a posted invoice, then the invoiced value on the receipt should be the net of the invoice value and the credit memo.