Hi Susan,
The reason for this scenario is that the Reference field in Inventory History is 10 characters long. PO is trying to send the full 12 characters.
The fix to this issue is to increase the width of the IC History Reference field to 12, to be able to accept the entire information from PO. Because this requires data conversion as well as potential compatibility problems, it's not a simple fix to just get the last digit to work. This is on our list of things to do, but we can't do it until we can change the data structure of the IC History file.
I can appreciate the frustration in not being able to look up the precise document number in IC.
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Regards,
Softrak Tech Support