AP Invoice Entry Error

I have a part that was ordered on a sales order and marked to drop ship. Part was ordered and delivered to customer. Drop shipment has been entered. When I pull the line into my invoice the vendor charged more than was on the PO so I try and change the line to the correct total and get this error. Any idea why it won’t let me change the price?

Thanks,
Lisa Meeks

Can you send the Details of the error?
Do you have any customizations or BPMs surrounding this?

I just put the same AP Invoice in my test system and I didn’t get the error. I will work with AP to get this straightened out. Thank you for the response.

This error generally occurs when system is expecting a value in any field, or expecting an object that is not getting set. This happens while there is a Customization layer behind … Placing a Debugger would help .,.,