Message type: E = Error
Message class:  CNV_2010C - Message class for CoA on Cloud 
Message number: 021
Message text: State entry not found
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_2010C021: State entry not found typically occurs in the context of data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or similar tools. This error indicates that the system is unable to find a specific state entry that is expected during the migration process. Causes: Missing or Incomplete Data: The state entry that the system is looking for may not exist in the source data or may not have been created during a previous step in the migration process.
Configuration Issues: There may be configuration settings that are not properly set up, leading to the system being unable to locate the required state entry. Incorrect Mapping: If the mapping of data from the source system to the target system is incorrect, it can lead to missing state entries. Technical Issues: There could be underlying technical issues, such as database inconsistencies or problems with the migration tool itself. Solutions: Check
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV_2010C020 Package not found
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_2010C019 No record found in table &1 for packid &2
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_2010C022 Mapping already in progress
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_2010C023 Mapping table update failed
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.