https://userapps.support.sap.com/sap/support/knowledge/en/2800147
2800147 - Message no. AG023 "BAPI_ATPAPO_CHECK" error / Y has been locked | SAP Knowledge Base...
When running ATP, the following error message is shown: Message no. AG023 - Error in calling function "BAPI_ATPAPO_CHECK" in APO server "X": "Value Y" has been...