Message type: E = Error
Message class:  CNV_20320_CHECK - Messages for check functions (Activity Types merge) 
Message number: 012
Message text: No target provided for source &1; mapping is not complete
The provided mapping is incomplete. A mapping line contains a source
value (&V1&) but not a target value.
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
You have to complete the mapping by providing the requested field values
or by deleting the mapping line which causes the problem.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message CNV_20320_CHECK012 indicates that there is an issue with the data mapping during a data migration or conversion process. Specifically, it means that for a given source field (denoted by &1), there is no corresponding target field defined, which results in an incomplete mapping.
Cause: Incomplete Mapping Configuration: The mapping between source and target fields has not been fully defined. This can happen if the mapping was not set up correctly or if some fields were omitted during the configuration. Missing Target Fields: The target structure may not have been fully defined or may be missing fields that correspond to the source fields. Data Model Changes: Changes in the data model (e.g., during an upgrade or migration) may have led to discrepancies between the source and target structures.
Solution: Check Mapping Configuration: Go to the mapping configuration in the relevant transaction (e.g., using transaction code LTMC for Migration Cockpit or LTMOM for Migration Object
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV_20320_CHECK011 No activity type split found
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_20320_CHECK010 Double mapping entry provided for source COAr &1 activity type &2
What causes this issue?  A specified source value in the mapping is assigned to multiple target values. To run the transformation solution all source ...
CNV_20320_CHECK013 No source provided for target &1; mapping is not complete
What causes this issue?  The provided mapping is incomplete. A mapping line contains a target value (&V1&) but not a source value.System Respo...
CNV_20320_CHECK014 Activity Type Check succesfully executed
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
Click on this link to search all SAP messages.