'Please enter required information - List_header'

 Hi,

When I copy an order to another order or RMA, I get the message 'Please enter required information - List_header'.

Normally this would mean something along the lines of the Price List or Modifier applied to the original Sales Order no longer being valid. Generally if that was the case, the normal message you would get is 'Validation failed for field - List_Header'.

Does anyone else get the message 'Please enter required information - List_header' and know how to get around it as currently we cannot copy orders? During the coping process I cannot see where I can enter the price list so I am at a loss as to why it gives this message.