Message type: E = Error
Message class:  CNV_20100 - Messageclass for chart of account conversion 
Message number: 333
Message text: Routine &1 is not specified in table CNV_20100_CFUNC
Not all conversion routines are specified in table CNV_20100_CFUNC.
The program found that the conversion routine &V1&, which is used for
converting field &V3& of table &V2&, does not exist in table
CNV_20100_CFUNC for the package &V4&.
Call the maintenance view V_20100_CFUNC via transaction SM30 and add an
entry for conversion routine &V1&.
Do not forget to specify the type of the conversion routine. The
following types are possible:
Routine converts a chart of accounts, e.g. INT
Routine converts an account/cost element, e.g. 100000000
Routine converts a set name, e.g. 0H8A-OPEN.GLPCOP
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_20100333 indicates that a specific routine (denoted as &1) is not defined in the table CNV_20100_CFUNC. This error typically arises during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or other data migration tools.
Cause: Missing Routine Definition: The routine that is being called during the migration process is not defined in the CNV_20100_CFUNC table. This could happen if the routine was not created, was deleted, or if there is a typo in the routine name.
Configuration Issues: There may be issues with the configuration of the migration project, leading to the system not being able to find the specified routine. Version Mismatch: If you are using a version of the migration tool that does not support the specified routine, this error may occur.
Solution: Check Routine Definition: Go to transaction SE11 (Data Dictionary) and check the contents of the table CNV_20100_CFUNC. Verify if the routine &1 exists in
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