Message type: E = Error
Message class:  CNV_NCE_BAS - Number conversion engine: messages 
Message number: 058
Message text: NRIV backup is created: &1 entries are saved
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_NCE_BAS058 indicates that a backup of NRIV (Number Range Intervals) has been created, and it specifies that a certain number of entries (denoted by &1) have been saved. This message is typically related to the data migration or conversion process, particularly when using SAP's tools for data migration, such as the SAP S/4HANA Migration Cockpit or other conversion tools.
Cause: The message is not necessarily an error but rather an informational message indicating that a backup of the number range intervals has been successfully created. This is a precautionary measure to ensure that the system can revert to a previous state if needed during data migration or conversion processes. The number range intervals are crucial for ensuring that unique identifiers (like document numbers) are generated correctly.
Solution: Review the Message: Since this is an informational message, you typically do not need to take any action unless you encounter issues later
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV_NCE_BAS057 NRIV state is not defined
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_10020169 &1 does not exist; check your input
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_NCE_BAS059 Downtime analysis results are used to determine new number levels
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_NCE_BAS060 NRIV state before conversion is used to determine new number levels
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.