Solution : https://service.sap.com/sap/support/notes/362269 (SAP Service marketplace login required)
Key words : 
'customer relationship management -> basic functions -> integration, system issues warning message crm_locmap006, assignment transaction business partner -> location, apo atp -> assignment, additional key words, prerequisites solution implement, attached program correction, message crm_locmap006, transaction crm_locmap, apo system
Related Notes : 
       
| 195884 | Collective note: Link between CRM and APO |