Message type: E = Error
Message class:  CNV_NCE_BAS - Number conversion engine: messages 
Message number: 129
Message text: No entries for object &1 exist in internal interval table
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_BAS129 indicates that there are no entries for a specified object in the internal interval table. This error typically arises during data migration or conversion processes, particularly when using SAP's data migration tools or during the execution of a conversion program.
Cause: Missing Data: The most common cause is that the required data for the specified object has not been populated in the internal interval table. This can happen if the data migration process was not executed correctly or if there were issues during the data extraction phase.
Configuration Issues: There may be configuration issues in the migration settings that prevent the correct data from being loaded into the internal tables. Incorrect Object Reference: The object reference specified in the error message may be incorrect or not properly defined in the system.
Solution: Check Data Population: Verify that the data for the specified object has been correctly populated in the internal interval
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV_NCE_BAS128 Number &1 does not belong to any interval of object &2
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_BAS127 Fiscal year is missing
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_BAS130 NR interval &1: conversion rule 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_NCE_BAS133 NR interval &1: invalid rule (subobject is empty)
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.