Solution : https://service.sap.com/sap/support/notes/197862 (SAP Service marketplace login required)
Key words :
create function group ps_summ_e, standard master data maintenance, define additional summarization characteristics, additional summarization characteristics involved, create function module ps_summ_exit_psmerk, master data maintenance, customer-specific supply, affected summarization characteristics, release 'enterprise sap', problem occurs due
Related Notes :
| 701076 | FAQ 2: Summarization in PS |
| 313899 | Summarization via master data characteristics |
| 303348 | User exits CNEX0025: Example |