Message type: E = Error
Message class:  CNV_10996 - Messages for archive conversion 
Message number: 077
Message text: CNVTABLES entry was created/changed: 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_10996077 typically relates to issues encountered during data migration or conversion processes, particularly when using the SAP Landscape Transformation (SLT) or SAP Data Services tools. The message indicates that an entry in the conversion tables (CNVTABLES) has been created or changed, which may lead to inconsistencies or errors in the data migration process.
Cause: Data Migration Issues: The error often arises when there are inconsistencies in the data being migrated, such as missing or incorrect entries in the conversion tables. Configuration Changes: Changes made to the configuration of the migration process or the conversion tables can trigger this error. Data Integrity Violations: If the data being processed violates integrity constraints or business rules defined in the conversion tables, this error may occur. Version Mismatch: Using incompatible versions of SAP tools or components can lead to unexpected behavior and errors.
Solution: Check Conversion Tables: Review the CNVTABLES entries to ensure that they are correctly
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV_10996076 CNVFIELDS entry was created/changed: table &1, field &2, routine &3
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_10996075 Cluster table &1 is relevant in package
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_10996078 Form routine &1 for converting table E001 requires parameters
What causes this issue?  Form routine &V1& has been identified as the best routine for converting the INIT data of structure E001 of archiving...
CNV_10996079 No participating CLUSTER-table found
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.