Solution : https://service.sap.com/sap/support/notes/694647 (SAP Service marketplace login required)
Key words :
user parameter atp_r3_simu, /3 stock information reason, /3 availability information, /3 atp information, support package 03, test purposes, longer works, program error, prerequisites
Related Notes :
| 854927 | Using the ATP_R3_SIMU parameter as of CRM 4.0 |