Hello Karl Heinz,
attached the relevant part from the R/3 docu:
...Access the material master record in Create or Change mode and choose Additional data ® Additional EANs.
Enter the unit of measure to which you want to assign additional EANs (International Article Numbers). You can enter only units of measure already specified on the Units of Measure screen.
You now have the following options:
If EANs are assigned internally, specify an EAN category, but not an EAN. The system will determine the EAN automatically when you choose Enter.
If EANs are assigned externally, specify an EAN. If you do not specify an EAN category, the system will determine it automatically when you choose Enter.
If the EAN has the EAN category for UPC-E (Universal Product Codes displayed in a contracted form), you must also specify the EAN category, but only if the EAN category for normal UPCs is also used in your system. For more information, see the documentation for the activity Define Attributes of EANs/UPCs in Customizing for the Material Master.
For each unit of measure, you must flag one EAN as the main EAN. When you exit the Additional EANs screen, this EAN is copied to the Units of Measure screen and, in the retail system, also to the Basic Data screen. In the industry system, it is copied to the Basic Data screen only if it is the EAN for the base unit of measure.
Repeat the above steps until you have assigned as many EANs as required.
Access the Units of Measure screen. Indicator A is now set, indicating that EANs exist in addition to the main one displayed here...
The EAN types (EAN 8, EAN 13, etc.) have to be defined in customizing prior to use.
I hope this answers your question.
Cheers Felix
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