Redwood PO Receipting Override distributions amounts, distribution amounts not the same

Hi,

When we receipt a Purchase Order in Redwood using the Override distributions amounts it states 'Make sure the sum of the distribution amounts is the same as the receipt amount and try again'. The amounts are the same and the PO has enough open funds on the line's split charge accounts to accommodate these receipts. Is there anything that I am missing or other items at play that could be preventing this.

Thanks in advance.

Andy