Hi Renjolyn

Thank you for the feedback. 

However, when I create credit note and want to add an invoice from the selection option on the right hand side it gives me a failed message. See first picture on the attached document. Then I would select a different customer and the invoice will pull through fine into the credit note (see second picture). What can be the reason for one to fail and for another to work?

Is there any troubleshooting options we can try and see what the problem might be?

Many thanks

ED