Message type: E = Error
Message class:  CNV_20100 - Messageclass for chart of account conversion 
Message number: 650
Message text: No company codes were uploaded into the mapping table
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_20100650: No company codes were uploaded into the mapping table typically occurs during data migration or conversion processes, particularly when using SAP's data migration tools. This error indicates that the system is unable to find any company codes in the mapping table that is required for the migration process.
Cause: Missing Data: The mapping table may not have been populated with the necessary company code data before the migration process was initiated. Incorrect Configuration: There may be an issue with the configuration settings that prevent the company codes from being uploaded correctly. Data Source Issues: The source data from which the company codes are supposed to be extracted may be incomplete or incorrectly formatted. Execution Order: The migration process may not have been executed in the correct order, leading to the mapping table not being populated as expected.
Solution: Check Mapping Table: Verify that the mapping table is correctly populated with the necessary
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV_20100649 Program SD_PLANVALUE_UPDATE is missing; proceed according to long text =>
What causes this issue?  Duplicate keys occurred during the conversion of table COES. The associated records were deleted in tables COES and COSP. Re-...
CNV_20100648 Activity 'Carry out Initialization' has not yet been executed
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_20100651 No charts of accounts were uploaded into the mapping table
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_20100652 TFK033D record deleted: &1 &2 &3 &4
What causes this issue?  Table TFK033D was converted using the <ZK>Copy Rows</> scenario. New data records were created. No old obsolete d...
Click on this link to search all SAP messages.