2766328 - SUM: SELSTACKXML_ASK: Stack configuration not useable: The stack configuration is not valid for the system <SID>, inst.-no. <inst. no>

• While performing an upgrade on Software Update Manager (SUM), the following error is seen in phase PREP_INPUT_CHECK/SELSTACKXML_ASK:
  

  Checks after phase PREP_INPUT_CHECK/SELSTACKXML_ASK were negative!
  
  

  Last error code set:
  Stack configuration not useable: The stack configuration is not valid for the
  system <SID> , inst.-no. <installation no.>

  
  Trouble Ticket Generation
  A trouble ticket and an archive with all relevant log files have been generated.
  Trouble ticket: "/usr/sap/<SID>/SUM/abap/log/SAPup_troubleticket.log"
  Log archive: "/usr/sap/<SID>/SUM/abap/log/SAPup_troubleticket_logs.sar"
  
  

• In SELSTACKXMLA.LOG, the following error can be seen:
  

  2 ETQ373 parameter "EV_MESSAGE" = "The stack configuration is not valid for the system <SID> , inst.-no. <installation no.>"
  4 ETQ399 ... Error reading stack info (rc = 8, reason = "The stack configuration is not valid for the system <SID> , inst.-no. <installation no.>")
  4EETQ399 Stack configuration not useable: The stack configuration is not valid for the system <SID> , inst.-no. <installation no.>
  4 ETQ010 Date & Time: <Date,Time>
  1EETQ399 Last error code set is: Stack configuration not useable: The stack configuration is not valid for
  1EETQ399Xthe system <SID> , inst.-no. <installation no.>
  1EETQ203 Upgrade phase "SELSTACKXML_ASK" aborted with errors ("<Date,Time>")

• Software Update Manager (SUM)
• Maintenance Planner

Stack.xml, Sysinfo.xml, Wrong system, Wrong installation number , KBA , BC-UPG-TLS-TLA , Upgrade tools for ABAP , BC-UPG-MP , Maintenance Planning Tools , Problem