Message type: E = Error
Message class:  CNV_CMIS - Message class for CMIS 
Message number: 142
Message text: Cross-client table &1 will be transferred
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_CMIS142 indicates that a cross-client table is being transferred during a data migration or conversion process. This message is typically associated with the SAP S/4HANA Migration Cockpit or other data migration tools that handle the transfer of data between systems or clients.
Cause: The error message CNV_CMIS142 is triggered when the system detects that a cross-client table (a table that is shared across all clients in an SAP system) is being processed in a way that is not allowed or is not properly configured. Cross-client tables are typically used for configuration data that should be consistent across all clients, and transferring data to or from these tables can lead to inconsistencies if not handled correctly.
Solution: To resolve this issue, consider the following steps: Check Configuration: Ensure that the migration or conversion process is correctly configured to handle cross-client tables. Review the mapping and transformation rules to ensure they are appropriate
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV_CMIS141 Field &1 in sender system differs from field &2 in  receiver 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_CMIS140 Loaded and calculated flags for MTID &1 have been reset
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_CMIS143 New status is not allowed for table &1
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_CMIS144 Table &1 has been not found in the table &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.