Message type: E = Error
Message class:  CNV20551 - message for package 20551 (company code delete) 
Message number: 896
Message text: NRIV Object &1 is not Valid
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 CNV20551896, which states "NRIV Object &1 is not Valid," typically occurs during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or similar tools. This error indicates that there is an issue with the number range object specified in the migration process.
Cause: Invalid Number Range Object: The number range object specified (represented by &1 in the error message) does not exist in the system or is not properly defined. Inactive Number Range: The number range object may exist but is not active or not properly configured. Authorization Issues: The user executing the migration may not have the necessary authorizations to access or modify the number range object.
Configuration Issues: There may be inconsistencies in the configuration of the number range object, such as missing intervals or incorrect settings.
Solution: Check Number Range Object: Go to transaction code SNRO (Number Range Objects) and verify that the number range object specified
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV20551895 Object Type &1 is not Valid
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV20551894 SUBMIT job: & SUBMIT not possible
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV20551897 KTOPL job &1 was scheduled in test run; see long text
What causes this issue?  The program has scheduled and released a background process for deleting a chart of accounts in test run. The system issues a...
CNV20551898 Invalid Table (Invalid name space or table does not exit)
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.