Message type: E = Error
Message class:  CNV - Conversion: Messages for Conversion Services (CNCC) 
Message number: 778
Message text: Some jobs for table &1 are still in the update phase
Some jobs for table &V1& are still in the update phase.
This means that the indexes must not be re-created yet.
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
Check the log for errors.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message CNV778 indicates that there are still jobs related to a specific table that are in the update phase. This typically occurs during data migration or conversion processes, particularly when using SAP's Data Migration tools or during system upgrades.
Cause: Ongoing Processes: The error usually arises when there are still background jobs or processes that are updating the specified table. This can happen if the data migration process has not completed or if there are locks on the table. Long-running Jobs: If the jobs are taking longer than expected due to large volumes of data or performance issues, the system may not allow further actions until these jobs are completed. Locking Issues: There may be locks on the table due to other transactions or processes that are currently accessing the data.
Solution: Check Background Jobs: Use transaction code SM37 to check the status of background jobs. Look for jobs related to the specific
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV777 Dropping of indexes has already been scheduled by another job
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV776 Table &1 has already been dropped by another job
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV779 Creation of indexes has already been scheduled by another job
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV780 Table &1 was not dropped; the update phase must not start
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.