Message type: E = Error
Message class:  CNV_20100 - Messageclass for chart of account conversion 
Message number: 038
Message text: All company codes must participate in the restructuring of CoA &1
According to the mapping table, you want to restructure accounts and
cost elements of the chart of accounts &V1& without changing the name of
the chart of accounts, and you do <ZH>not</> plan to copy the old chart
of accounts.
Because you do not change the name of the chart of accounts, the
conversion must necessarily cover all company codes that use this chart
of accounts. Otherwise, the non-participating company codes would be
destroyed.
Add the missing company codes in the mapping maintenance view.
&ADDITIONAL_HINTS&
If you really do not want to change the chart of accounts for the
company codes specified as 'non-participating', assign a new name to the
chart of accounts in the mapping maintenance view (new CoA) and set the
<ZK>Copy Rows</> indicator.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message CNV_20100038 indicates that all company codes must participate in the restructuring of the Chart of Accounts (CoA) during a migration or conversion process. This error typically arises in the context of using the SAP Conversion or Migration tools, particularly when transitioning to a new Chart of Accounts.
Cause: The error occurs when: Inconsistent Company Code Participation: Not all company codes defined in the system are included in the restructuring process for the Chart of Accounts. This can happen if some company codes are excluded from the migration or if there are discrepancies in the configuration.
Configuration Issues: There may be issues in the configuration settings that prevent certain company codes from being recognized as part of the restructuring process. Data Integrity Issues: There might be data integrity issues where some company codes do not have the necessary data or settings to participate in the restructuring.
Solution: To resolve this error, you can take
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