Warning to Error in Inventory

[xavier_fuentes_tafall_197]

I think there are a problem with inventories when materials are managed with serial numbers ...

When I count from the RF, I can count 4 UN of a material managed with serial numbers, but read only 3 serial numbers ... And the system accepts it without complaining.

Then, when I post  this from SAPGUI (4 UN and 3 serial numbers), the system only returns a warning ...

How can I turn this warning into an error?

I've searched for SAP notes about it and I have not found anything

[xavier_fuentes_tafall_197]

I expand my question

The problem is that if in the EWM monitor I consult the corresponding inventory document, it seems as if I had registered 4 UN, although in the stock only 3 UN is recorded.