Message type: E = Error
Message class:  CNV_20100 - Messageclass for chart of account conversion 
Message number: 135
Message text: No copy of chart of accounts
Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.
To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.
Unfortunately, there isn't any extra information in this error notice.
First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).
Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.
You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.
The SAP error message CNV_20100135: No copy of chart of accounts typically occurs during the data migration process, particularly when using the SAP S/4HANA Migration Cockpit or other data migration tools. This error indicates that the system is unable to find a valid copy of the chart of accounts (CoA) that is required for the migration process.
Cause: Missing Chart of Accounts: The chart of accounts may not have been created or copied in the target system. Incorrect Configuration: The configuration settings for the chart of accounts may not be set up correctly. Data Migration Settings: The migration settings may not be pointing to the correct chart of accounts. Authorization Issues: There may be authorization issues preventing access to the chart of accounts.
Solution: Check Chart of Accounts: Ensure that the chart of accounts exists in the target system. You can check this in the SAP GUI by navigating to SPRO > Financial Accounting > General Ledger >
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV_20100134 Entries were transferred to table &1
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_20100133 No routines for G/L account and cost element conversion found
What causes this issue?  You simply want to rename charts of accounts without changing any accounts or cost elements.System Response  In this case, th...
CNV_20100136 Keep basic settings
What causes this issue?  The basic settings are retained unchanged. This means: The current values for the indicator for duplicate handling and the &l...
CNV_20100137 For CoA &1, no company code was indicated (country-specific CoA)
What causes this issue?  When maintaining the mapping table, you stated that you want to convert the chart of accounts &V1&. However you selec...
Click on this link to search all SAP messages.