How To Fix CNV_MBT421 - &1. Select Task icon to check status of subactivities

CNV_MBT421 - Overview

• Message type: E = Error

• Message class: CNV_MBT - PCL message class

• Message number: 421

• Message text: &1. Select Task icon to check status of subactivities

What causes this issue?

The execution of activities with subactivities (tasks) has been
detected by the process status refresh procedure . The displayed status
of these activities in the standard view of Process Tree / Monitor
might not be sufficient to decide, whether a process step is still
running or needed to be stopped because of errors or system resources
are busy.

System Response

The status of activities with subactivities is kept as running as long
as not all subactivities to be handled are completed.

How to fix this error?

Call Task display ( Icon in Tasks column ) to get detailed status
information about all subactivities in the corresponding activity
execution .
This information can also be accessed within the Extended Process
Monitor .

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

CNV_MBT421 - Details

• The SAP error message CNV_MBT421 typically relates to issues encountered during a data migration or conversion process, particularly when using the SAP S/4HANA Migration Cockpit or similar tools. The message indicates that there is a problem with a specific task in the migration process, and it suggests checking the status of subactivities for more details.
  
  Cause:
  
  Incomplete Data: The error may arise if the data being migrated is incomplete or does not meet the required format or constraints.
  
  Configuration Issues: There may be configuration issues in the migration settings or parameters that need to be addressed.
  Dependency Failures: If there are dependencies between tasks, a failure in one task can lead to errors in subsequent tasks.
  Authorization Issues: Lack of proper authorizations for the user executing the migration can also lead to this error.
  Technical Errors: There could be underlying technical issues, such as database connectivity problems or system resource limitations.
  
  
  Solution:
  
  Check Task Status: Click on the