How To Fix CNV_MBT308 - Activity &1 in package &2, phase &3 has already been started

CNV_MBT308 - Overview

• Message type: E = Error

• Message class: CNV_MBT - PCL message class

• Message number: 308

• Message text: Activity &1 in package &2, phase &3 has already been started

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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CNV_MBT308 - Details

• The SAP error message CNV_MBT308 typically indicates that a specific activity in a migration or conversion process has already been initiated and is currently running. This error is part of the SAP Conversion and Migration tools, often used during system upgrades or data migrations.
  
  Cause:
  The error occurs when:
  
  An attempt is made to start a migration activity that is already in progress.
  There may be multiple sessions or users trying to execute the same activity simultaneously.
  The system might not have properly released the lock on the activity after a previous execution.
  
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Running Activities: 
  
  Use transaction codes like SM37 (Job Monitoring) to check if the activity is currently running. Look for jobs related to the package and phase mentioned in the error message.
  
  
  
  Wait for Completion: 
  
  If the activity is indeed running, you may need to wait for it to complete before attempting to start it