Solution : https://service.sap.com/sap/support/notes/120104 (SAP Service marketplace login required)
Key words : 
additional key words rmdating, find customer include ci_mmh1, rmdating generates source code, execute report rmdating, syntax errors occur, function modules mat_move_bmmh1_, created field zkundenfeld, customer-specific field, function module mat_move_bmmh1_marc, flag 'generate code
Related Notes : 
       
| 534191 | IS-H: Material master direct input | 
| 44410 | Integrating cust.-specific fields in matl master |