Message type: E = Error
Message class:  CNV_CDMC_CA - CDMC Clearing Analysis 
Message number: 212
Message text: Piecelist & is invalid
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_CDMC_CA212 typically indicates that there is an issue with the piecelist in the context of a data conversion or migration process. This error is often encountered during the execution of the SAP Conversion and Migration tools, particularly when dealing with the Customer Data Migration Cockpit (CDMC) or similar tools.
Cause: The error message CNV_CDMC_CA212 suggests that the piecelist being referenced is invalid. This could be due to several reasons: Incorrect Configuration: The piecelist may not be properly configured or may not exist in the system. Data Integrity Issues: There may be inconsistencies or missing data in the piecelist that prevent it from being recognized as valid. Version Mismatch: The piecelist may be incompatible with the version of the SAP system you are using. Authorization Issues: The user executing the process may not have the necessary permissions to access or modify the piecelist.
Solution: To resolve the CNV_CDMC_CA212 error, you can take the following steps: Check
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV_CDMC_CA211 RFC destination different from destination system
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_CDMC_CA210 Error while displaying activity "Determine Empty Databases" document
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_CDMC_CA213 Enter piecelist
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_CDMC_CA214 No active CMOD projects found in analysis system
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.