How To Fix CNV_NCE_BAS255 - Row &1: conversion rule &2 is not valid

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_NCE_BAS - Number conversion engine: messages

• Message number: 255

• Message text: Row &1: conversion rule &2 is not valid

What causes this issue?

You uploaded a file that contains an invalid conversion rule in row &V1&
.
The following conversion rules are permitted:
1 - Offset mode
2 - Pattern mode
3 - Shifting mode
4 - External code
6 - One-to-one
N - No change

System Response

The mapping value specified in the row above is not used.

How to fix this error?

Specify a valid conversion rule, and upload the file again.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_NCE_BAS255 - Row &1: conversion rule &2 is not valid ?

  The SAP error message CNV_NCE_BAS255 typically occurs during data conversion processes, particularly when using the SAP Data Migration tools or during the execution of a conversion program. This error indicates that there is an issue with a conversion rule that is being applied to a specific row of data.
  Cause:
  The error message "Row &1: conversion rule &2 is not valid" suggests that:
  
  Invalid Conversion Rule: The conversion rule specified (denoted by &2) is not recognized or is incorrectly defined in the context of the data being processed.
  Data Issues: The data in row &1 may not meet the criteria required for the conversion rule to be applied successfully.
  Configuration Issues: There may be a misconfiguration in the data migration settings or the mapping of fields.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Conversion Rules:
  
  Review the conversion rules defined in your data migration project. Ensure that the rule specified in the error message is correctly defined and valid for the data being processed.
  
  
  
  Validate Data:
  
  Inspect the data in row &1 to ensure it conforms to the expected format and values that the conversion rule requires. Look for any anomalies or unexpected values.
  
  
  
  Review Mapping Configuration:
  
  Check the mapping configuration in your data migration tool. Ensure that all fields are correctly mapped and that the conversion rules are applied to the correct fields.
  
  
  
  Consult Documentation:
  
  Refer to the SAP documentation or help resources related to the specific data migration tool you are using. This may provide insights into the expected formats and valid conversion rules.
  
  
  
  Debugging:
  
  If you have access to debugging tools, you can trace the execution of the conversion process to identify where the failure occurs and gather more context about the error.
  
  
  
  Seek Support:
  
  If the issue persists, consider reaching out to SAP support or consulting with a technical expert who has experience with data migration in SAP.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide updates and patches related to data migration tools.
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  Training and Documentation: Ensure that your team is familiar with the data migration tools and best practices for defining conversion rules.
  
  By following these steps, you should be able to identify the root cause of the error and implement a solution to resolve it.