Message type: E = Error
Message class:  CNVOM_DEL_CHECK - Messages for Deletion Check 
Message number: 004
Message text: Data set '&1' inactive
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.
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The SAP error message CNVOM_DEL_CHECK004 indicates that a specific data set (denoted as &1) is inactive. This error typically arises in the context of data migration or data conversion processes, particularly when using SAP's tools for data migration, such as the SAP S/4HANA Migration Cockpit or other data conversion tools.
Cause: The error occurs because the data set you are trying to work with is not active. This can happen for several reasons: The data set was never activated. The data set was deactivated after being created. There may be issues with the configuration or setup of the data set.
Solution: To resolve this error, you can follow these steps: Check Data Set Status: Go to the relevant transaction or tool where the data set is defined (e.g., transaction code LTMC for Migration Cockpit). Look for the data set in question and check its status. Ensure that it is marked as active. Activate the Data Set: If the data set is inactive,
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