Message type: E = Error
Message class:  CNV_20100 - Messageclass for chart of account conversion 
Message number: 210
Message text: CoA &1 must participate in the conversion for converting CoA &2
The system found that you want to convert chart of account &V2&. This
chart of accounts &V2& is used as the group chart of accounts by chart
of accounts &V1&.
The <ZK>Copy Rows</> indicator is not set.
In this case, chart of accounts &V1& and all company codes that use it
must participate in the conversion if you want to convert chart of
accounts &V2&.
This prerequisite is currently not met.
Either include chart of accounts &V1& as well as all company codes that
use it in the conversion, or set the <ZK>Copy Rows</> indicator for the
mapping entry &V2& -> &V3&.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message CNV_20100210 typically occurs during the conversion process in SAP systems, particularly when dealing with the conversion of Chart of Accounts (CoA). This error indicates that the source CoA (CoA &2) must have a corresponding target CoA (CoA &1) that participates in the conversion process.
Cause: The error arises when: The target CoA (CoA &1) is not properly defined or is missing in the conversion settings. The mapping between the source CoA and the target CoA is not correctly established. There may be inconsistencies in the configuration of the CoAs in the system.
Solution: To resolve this error, you can follow these steps: Check CoA Configuration: Ensure that both the source CoA (CoA &2) and the target CoA (CoA &1) are correctly defined in the system. Verify that the target CoA is active and properly configured in the system. Review Conversion Settings: Go to the transaction or program responsible for the conversion (often part of the SAP Migration Cockpit
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