Message type: E = Error
Message class:  CNV_NCE_BAS - Number conversion engine: messages 
Message number: 149
Message text: NR interval &1: target interval limits are not specified
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_BAS149 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 configuration of the target intervals for a specific data field or object.
Cause: The error message "NR interval &1: target interval limits are not specified" suggests that the system is expecting a range of values (an interval) for a numeric field, but the limits for that interval have not been defined. This can happen due to: Missing Configuration: The target interval limits for the numeric field have not been set up in the migration settings. Incorrect Mapping: The mapping between the source and target fields may not be correctly defined, leading to the absence of expected interval limits. Data Issues: The data being migrated may not conform to the expected format or range, causing the system to fail in determining the
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV_NCE_BAS148 NR interval &1: shifting mode is not possible
What causes this issue?  You have chosen the rule 'Shifting mode' for the corresponding number range interval, although it contains alphanum...
CNV_NCE_BAS147 NR interval &1: offset mode is not possible
What causes this issue?  You have chosen the rule 'Offset mode' for the corresponding number range interval, although it contains alphanumer...
CNV_NCE_BAS150 NR interval &1: pattern '&2' is not valid (out of range)
What causes this issue?  If you apply this pattern to the numbers of the source interval, they will lie outside the boundaries of the target interval....
CNV_NCE_BAS151 NR interval &1: source and target NR intervals are not identical
What causes this issue?  You have chosen the rule 'No conversion' or 'One-to-one' for the corresponding number range interval, but...
Click on this link to search all SAP messages.