Message type: E = Error
Message class:  CNV_CMIS_M - Message class for CMIS Migration 
Message number: 221
Message text: Error while modifying the field catalogue
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_M221 typically occurs during the process of modifying the field catalog in the context of data migration or conversion projects, particularly when using the SAP S/4HANA Migration Cockpit or similar tools. This error indicates that there is an issue with the field catalog configuration, which can prevent the successful execution of data migration tasks. Causes of CNV_CMIS_M221 Field Catalog
Configuration Issues: The field catalog may not be properly configured, which can include missing fields, incorrect data types, or incompatible field settings. Data Type Mismatches: If the data types of the source fields do not match the expected data types in the target system, this can lead to errors. Inconsistent Field Definitions: If there are inconsistencies in how fields are defined between the source and target systems, this can cause issues when trying to modify the field catalog. Authorization Issues: Lack of proper authorizations to modify the field catalog can also trigger
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV_CMIS_M220 You cannot create a new mapping entry on this node
What causes this issue?  This is a semantic node. You cannot create a new mapping entry on this node.How to fix this error?  Select the routine name n...
CNV_CMIS_M219 No values could be found from 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_CMIS_M222 There are no mapping entries for this rule
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_M223 You can only create a new mapping entry on the rule name node
What causes this issue?  You cannot create a new entry on the domain node.How to fix this error?  Double-click the Rulename node (main node) and choos...
Click on this link to search all SAP messages.