How To Fix CNV_20100091 - No N:1 merges of G/L accounts or cost elements

CNV_20100091 - Overview

• Message type: E = Error

• Message class: CNV_20100 - Messageclass for chart of account conversion

• Message number: 091

• Message text: No N:1 merges of G/L accounts or cost elements

What causes this issue?

The program found, that no merges of G/L accounts or cost elements are
present.

System Response

If also no chart of accounts merge is present, then the duplicate
processing indicator can be ignored when generating the conversion
programs. This can improve the performance of the conversion.
Nevertheless the risk of an abortion during phase CONVERSION is also
slightly higher. Such an abortion can occur if a given G/L account/cost
element is mapped to an interval value, but the interval value itself is
no existing G/L account/cost element.
In case the upcoming test conversion runs into performance problems,
then you might consider setting the parameter
CNV_20100_NO_N_TO_1_NO_SUMUP via transaction CNV_PARAMS in the execution
system for the active package.
Note that a change of this parameter value only has an effect if
activity <ZK>Adjust Scenario-Related Settings (Chart of Accounts) </>is
<ZH>NOT </>executed yet.
For further information refer to the documentation of this parameter in
CNV_PARAMS.

How to fix this error?

Information

Procedure for System Administrators

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.

CNV_20100091 - Details

• The SAP error message CNV_20100091 indicates that there are no N:1 merges of G/L accounts or cost elements during a data migration or conversion process. This error typically arises in the context of using the SAP S/4HANA Migration Cockpit or during data migration projects where financial data is being consolidated or transformed.
  
  Cause:
  
  Data Structure Issues: The error may occur if the mapping of G/L accounts or cost elements does not allow for a proper N:1 merge. This means that the system cannot find a way to consolidate multiple accounts into a single account as required.
  Configuration Errors: There may be configuration issues in the migration settings or in the mapping tables that define how accounts should be merged.
  Data Quality Issues: The source data may have inconsistencies or duplicates that prevent the merging process from being executed correctly.
  Missing Mapping: If the mapping for the G/L accounts or cost elements is not defined or