IDoc inbound failed with error : Mat Not defined

Hello all,

I have an issue with the inbound IDoc,( msg type ORDERS) .

the Error message is :

Material 5410138034269 is not defined for sales org.0970 , distr.chan.10 , language

5410138034269 is an EAN nr. used in MEAN Table.

in the segment E1EDP19 , the number is filled.

And it is maintained like the pic below in Material Master.

I dont know if in the IDOC the Unit of Measure should also be filled ? if yes, where it should be maintained?

plus , strange is, if i change the EAN to the material nr, the IDoc could be processed, and the order is also created successfully.

Could anyone explain that ? ( I think we are using the standard sap function to process the IDocs)

Thanks

regard

Recke