Solution : https://service.sap.com/sap/support/notes/628786 (SAP Service marketplace login required)
Key words :
attached source code corrections, create product groups, transaction mc84, system generates, error message, implemented manually, support package, terms mc84, form pg_anlage, clientdata-base_uom
Related Notes :
| 814673 | MC84: How to identify required fields (MG 144) |
| 592229 | MC84: Create product group with generated material number |