How To Fix CNV_DMC_HC042 - Multiple master jobs are running (&1 master jobs are running)

CNV_DMC_HC042 - Overview

• Message type: E = Error

• Message class: CNV_DMC_HC -

• Message number: 042

• Message text: Multiple master jobs are running (&1 master jobs are running)

What causes this issue?

There are multiple SAP Landscape Transformation Replication Server
master jobs running which should not be the case.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Multiple active master jobs active can result in issues. In transaction
SM37, search for job /1LT/IUC_REP_MSTR. You should find more than one
active entry. If not, extend the timeframe for which the search is
executed. Stop the jobs which have been running the longest until there
is only one active job.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

CNV_DMC_HC042 - Details

• The SAP error message CNV_DMC_HC042 indicates that multiple master jobs are currently running in the Data Migration Cockpit (DMC) environment. This situation can occur when the system is trying to execute multiple instances of a master job simultaneously, which is not allowed.
  
  Cause:
  
  
  Concurrent Execution: The primary cause of this error is that the system has detected that more than one master job is currently active. This can happen if:
  
  A previous job has not completed yet.
  A job was accidentally started multiple times.
  There is a misconfiguration in the job scheduling.
  
  
  
  System Configuration: The system may be configured to allow only a single instance of a master job to run at any given time, and if another instance is triggered, it will raise this error.
  
  
  
  Solution:
  
  
  Check Running Jobs: 
  
  Go to the transaction code SM37 (Job Monitoring) in SAP.
  Check for any running jobs related to the Data Migration Cockpit. Look for jobs with the same name or