Message type: E = Error
Message class:  CNV_NCE_BAS - Number conversion engine: messages 
Message number: 438
Message text: Activities must be repeated for number range object &1 (s. long text)
Execute the activites <ZK>Prepare Number Conversion Engine for Use</>
and <ZK>Analyse Number Range Objects</>.
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.
The SAP error message CNV_NCE_BAS438 typically occurs during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or similar tools. This error indicates that activities related to a specific number range object need to be repeated, which can happen for various reasons.
Cause: Incomplete Processing: The activities related to the number range object were not completed successfully. This could be due to a previous error or interruption during the migration process.
Configuration Issues: There may be issues with the configuration of the number range object itself, such as missing or incorrect settings. Data Consistency: The data being migrated may not be consistent with the expected format or structure, leading to failures in processing the number range. Authorization Issues: The user executing the migration may not have the necessary authorizations to perform actions related to the number range object.
Solution: Review Long Text: Check the long text associated with the error message for specific
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV_NCE_BAS437 Number range object &1 is not analyzed yet
What causes this issue?  Number range object &V1& was not analyzed.System Response  The system issues an error message and will not allow you ...
CNV_NCE_BAS436 Number range intervals for object &1 were changed
What causes this issue?  Number ranges were changed after the activity <ZK>Analyze Number Range Objects</> was executed.System Response  T...
CNV_NCE_BAS439 Creating initial mapping values for number range object &1
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_NCE_BAS440 Pattern '&2' is too long
What causes this issue?  Maximum number length for number range object &V1& is &V3&System Response  The system issues an error message...
Click on this link to search all SAP messages.