Message type: E = Error
Message class:  CNV_CMIS_A_20_FUNC - Message texts for CNV_CMIS_A_20 function modules 
Message number: 010
Message text: Combination &1, &2, &3, &4 already part of the exclude fields list
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_CMIS_A_20_FUNC010 indicates that a specific combination of fields (represented by placeholders &1, &2, &3, &4) is already included in the list of fields that are excluded from a certain process or operation. This error typically arises during data migration or conversion processes, particularly when using SAP's Conversion Tools or Data Migration tools.
Cause: The error occurs when: You are trying to add a combination of fields to an exclusion list that is already present in that list. There may be a logical error in the configuration or mapping of the fields during the data migration process. The system is attempting to process data that has already been marked for exclusion, leading to redundancy.
Solution: To resolve this error, you can take the following steps: Check the Exclusion List: Review the exclusion list to confirm that the combination of fields you are trying to add is indeed already present. You can do this by navigating
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV_CMIS_A_20_FUNC009 Combination &1, &2, &3 does not exist; enter valid data
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_CMIS_A_20_FUNC008 Combination &1, &2, &3, &4 does not exist; enter valid data
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_CMIS_A_20_FUNC011 Exclude fields list not changed
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_CMIS_A_20_FUNC012 Error while deleting data from the database; see long text
 <LS>&CAUSE&</> You are trying to remove the existing list of excluded objects in the <LS>Create Worklists </>activity...
Click on this link to search all SAP messages.