Invalid Length UOM specified

Trying to make a RMA disposition , when Return Shipment is selected in the Dispose to field I get the following error message : Invalid Length UOM specified. It doesn’t happen if Stock is selected.
Any thoughs?

Thank you

@Maria_E If this is a part on the fly then it is possible the UOM is either set differently than the first time it was used or blank. I had this with a bunch of RFQs and had to make an UBAQ to fix the old UOM to match.

@gpayne No, the part is no on the fly, it’s count.

@Maria_E You could have a data issue. I would get support involved.

@gpayne Thank you very much!