How To Fix CNV20201438 - &1: No duplicates due to simul. conv. in fiscal years <= &2 due to NRIV

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV20201 -

• Message number: 438

• Message text: &1: No duplicates due to simul. conv. in fiscal years <= &2 due to NRIV

What causes this issue?

&V1&: No duplicates found during simulated conversion of objects for
fiscal years <= &V2& based on the information provided in the table
NRIV.
The value table for the number range object &V1& is not known or not
precise enough to allow for a check for duplicates.
The information contained in NRIV is used as the basis for the check
for duplicates. This means that the simulation cannot show for sure if
objects will become identical due to the conversion or not, and if
consequently duplicates can occur in a given table or not.

System Response

Warning
Possible alphanumeric values within the number interval that may have
come into existence, for example, during a previous conversion, are not
considered here.

How to fix this error?

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

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV20201438 - &1: No duplicates due to simul. conv. in fiscal years <= &2 due to NRIV ?

  The SAP error message CNV20201438 indicates that there are no duplicates allowed during the simulation conversion for fiscal years that are less than or equal to a specified year (denoted by &2). This error is related to the data conversion process, particularly in the context of the SAP S/4HANA migration or data transfer scenarios.
  Cause:
  
  Data Duplication: The error typically arises when the system detects potential duplicate entries in the data that is being converted or migrated. The NRIV (Number Range Interval) is a mechanism in SAP that manages number ranges for various objects, and it plays a crucial role in ensuring that unique identifiers are maintained during data operations.
  Fiscal Year Constraints: The error specifically mentions fiscal years less than or equal to a certain year, indicating that the issue is likely tied to how data is structured or how fiscal years are defined in the system.
  
  Solution:
  
  Check for Duplicates: Review the data that is being converted to identify any duplicate entries. This may involve checking the relevant tables and ensuring that there are no overlapping or duplicate records that could cause conflicts during the conversion process.
  Adjust Number Ranges: If the issue is related to number ranges, ensure that the NRIV settings are correctly configured. You may need to adjust the number ranges to avoid conflicts or overlaps.
  Data Cleanup: If duplicates are found, you may need to clean up the data before proceeding with the conversion. This could involve deleting or merging duplicate records.
  Simulation Mode: Since the error occurs during a simulation conversion, you can try running the conversion in a different mode (if applicable) to see if the issue persists. This may help in identifying whether the problem is specific to the simulation process.
  Consult Documentation: Refer to SAP documentation or notes related to the CNV2020 tool or the specific migration process you are using. There may be additional guidelines or best practices that can help resolve the issue.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that address this specific error message or provide guidance on handling data conversion issues.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  Testing Environment: If possible, replicate the issue in a testing environment to better understand the root cause without affecting production data.
  
  By following these steps, you should be able to diagnose and resolve the CNV20201438 error effectively.