Split incoming invoice into parked and posted based on errors

Hi experts,

We are using invoic02 idoc to create incoming invoice from the vendor, with process code INVL and FM IDOC_INPUT_INVOIC_MRM.

Based on our requirements, we need to park an invoice if the price is out of tolerance limit. So if we have 2 line items in an invoice, and 1 of them is out of tolerance, we need to split the invoice into 2 and post the good line item and park the bad one. How can we accomplish this? Any user exit to do this best?

Any suggestions will be greatly appreciated.

Thanks in advance!

Anjana.