GPZ (ABAP) - ABAP Instance not available (GPZ asgpz01_GPZ_00 (ABAP_SRV))
We have stopped & started the application asgpz01_GPZ_00 with reference of the below mentioned scheduled change. 
CHG000011418084 | SAP-RUN-NA-ENTERPRISE GRC-IS-GRC-PROD-GPZ: Parameter Change 
Activity completed successfully, all the applications are up & running fine. 