Message type: E = Error
Message class:  CNV_20100 - Messageclass for chart of account conversion 
Message number: 097
Message text: No company codes could be selected
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_20100097: No company codes could be selected typically occurs during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or similar tools. This error indicates that the system could not find any company codes that meet the selection criteria specified in the migration process. Causes: Incorrect Selection Criteria: The selection criteria for company codes may be too restrictive or incorrectly defined, leading to no company codes being available for selection. Missing Company Codes: The company codes may not be created or activated in the system. Authorization Issues: The user executing the migration may not have the necessary authorizations to view or select the company codes. Data Consistency Issues: There may be inconsistencies in the data that prevent the system from recognizing the company codes.
Configuration Issues: The system may not be properly configured to recognize the company codes, especially in a newly set up environment. Solutions: Check Selection Criteria: Review
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV_20100096 Priority is set for G/L account &1 (no CostEl); CostEl merge arbitrary
What causes this issue?  During the check, the system found that the priority indicator is set for an account &V1& that is a only a G/L accoun...
CNV_20100095 For target &3, priority indicator has been set more than once
What causes this issue?  The priority indicator is set for the mapping &V1& -> &V3& as well as for the mapping &V2& -> &...
CNV_20100098 Following organizational units participate in the conversion:
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_20100099 &1 = &2
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
Click on this link to search all SAP messages.