Message type: E = Error
Message class:  CNV_CMIS_M - Message class for CMIS Migration 
Message number: 306
Message text: Error while updating table &1
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_M306 typically indicates that there was an error while trying to update a specific table in the SAP system. This error is often associated with data migration or conversion processes, particularly when using the SAP Conversion Management Information System (CMIS) or during data transfer activities.
Cause: The error can be caused by several factors, including but not limited to: Data Integrity Issues: The data being processed may violate constraints or rules defined in the target table (e.g., primary key violations, foreign key constraints). Locking Issues: The table may be locked by another process, preventing the update from being executed. Insufficient Authorizations: The user executing the update may not have the necessary permissions to modify the table. Technical Issues: There may be underlying technical issues such as database connectivity problems or issues with the SAP system itself. Incorrect Configuration: The configuration settings for the data migration process may be incorrect, leading to failed updates.
Solution: To
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV_CMIS_M305 Changes have been saved
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_M304 Entry &1 was deleted from the current list
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_M307 Error while downloading file &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_CMIS_M308 Download was successfully completed
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.