Message type: E = Error
Message class:  CNV_20100 - Messageclass for chart of account conversion 
Message number: 138
Message text: CoA &1 is implemented as country-specific CoA: No CoCds selected
Chart of accounts &V1& is meant to be implemented as country-specific
chart of accounts of &V2& with name &V3&.
No company codes have been selected (Altkt indicator set) for which this
country-specific chart of accounts should be implemented.
Error
Set flag 'AltKt' for all company codes for which the chart of accounts
&V1& is meant to be implemented as country-specific chart of accounts.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message CNV_20100138 indicates that a Chart of Accounts (CoA) is implemented as a country-specific CoA, but no Company Codes (CoCds) have been selected for it. This error typically arises during the migration or conversion process when using the SAP Conversion Tools, particularly in the context of the SAP S/4HANA migration.
Cause: Country-Specific CoA: The Chart of Accounts you are trying to use is defined as country-specific, which means it is tailored for a specific country’s accounting requirements. No Company Codes Selected: The error suggests that while the CoA is set up, there are no Company Codes assigned to it. This is necessary for the CoA to be functional within the system.
Solution: To resolve this error, you need to ensure that at least one Company Code is assigned to the country-specific Chart of Accounts. Here are the steps to do this: Access the SAP GUI: Log into your SAP system. Navigate to the CoA
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