Resolving Datacom DB00912E SYSPLEX mismatch error

Products

• Datacom
• Datacom/AD
• Datacom/DB

Issue/Introduction

When starting the MUF, errors were received about the SYSPLEX name:

DB00912E - CXX SYSPLEX x DOES NOT MATCH CURRENT SYSPLEX y
DB00501E - OPEN ERROR - RETURN CODE 47 (008) CXX=cxxname  (CXX     )

Resolution

To correct the SYSPLEX name, both the MUF and the applications using the MUF must not be running.

There are two ways to update the CXX with the correct SYSPLEX name: 

1. Run DBUTLTY with this input:
   //SYSIN    DD  *
   CXXMAINT OPTION=ALTER,OPTION2=MATCHSID
   /*
   This will assume the SYSPLEX name from the system where the job was run.
   
   
2. Run DBUTLTY with this input:
   //SYSIN    DD  *
   CXXMAINT OPTION=ALTER,OPTION2=MATCHSID,OUTNAME=sysplex-name
   /*
   Where Sysplex-name must be the SYSPLEX name for the LPAR where the MUF will execute.

Additional Information

• The SYSPLEX name is stored in the CXX of each MUF when the CXX is initialized and it can be verified by either running a DBUTLTY MEMORY=MVS report or looking in the MUF's JESMSGLG for the message DB00905I.
• This DBUTLTY job must run with the MUF down. Otherwise, the job will receive this error:
  DB10053E - MUF RUNNING, FUNCTION REQUIRES MUF DOWN