Message type: E = Error
Message class:  CNV_20100 - Messageclass for chart of account conversion 
Message number: 037
Message text: For chart of accounts &1, no company code was indicated (operative CoA)
When maintaining the mapping table, you specified a chart of accounts
you want to convert.
However you entered none of the company codes that use chart of accounts
&V1& as a participating company code.
Chart of accounts &V1& is used as the operative chart of accounts by at
least one company code (for example,  company code &V2&).
Error
You must indicate at least one company code in the mapping table
(activity <ZK>Specify Accounts and Chart of accounts for Conversion</>).
If you want to carry out the conversion in all company codes, you must
indicate all company codes explicitly in the maintenance view.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message CNV_20100037 indicates that there is an issue with the configuration of the chart of accounts (CoA) in relation to a company code. Specifically, it means that for the specified chart of accounts (&1), no company code has been indicated as operative. This can occur during data migration or when setting up financial accounting in SAP.
Cause: Missing Company Code Assignment: The chart of accounts has not been assigned to any company code, which is necessary for it to be operational. Incorrect Configuration: The configuration settings for the chart of accounts may not have been completed correctly. Data Migration Issues: If you are migrating data from another system, the mapping of the chart of accounts to the company codes may not have been done properly.
Solution: Assign Company Code: Go to the transaction code OBY6 (or navigate through the SAP menu: Financial Accounting > General Ledger > Master Data > G/L Accounts > Preparation
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