How To Fix CNV20201437 - &1: No duplicates during simul. conversion in fiscal year &2 due to NRIV

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV20201 -

• Message number: 437

• Message text: &1: No duplicates during simul. conversion in fiscal year &2 due to NRIV

What causes this issue?

&V1&: No duplicates found during simulated conversion of objects in
fiscal year &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 CNV20201437 - &1: No duplicates during simul. conversion in fiscal year &2 due to NRIV ?

  The SAP error message CNV20201437 indicates that during a simulation conversion in a specific fiscal year, the system has detected that there are no duplicates due to NRIV (Number Range Intervals). This error typically arises in the context of data migration or conversion processes, particularly when using SAP's Conversion Tools.
  Cause:
  
  No Duplicate Records: The error suggests that the system expected to find duplicate records in the specified fiscal year but did not find any. This could be due to the data being clean or the way the data is structured.
  NRIV Configuration: The NRIV (Number Range Intervals) settings may not be configured correctly, or the number ranges may not be set up to allow for duplicates in the specified fiscal year.
  Data Migration Process: If you are running a simulation for data migration, it may be that the data being migrated does not have the expected duplicates, which could be a result of previous data cleansing or incorrect assumptions about the data.
  
  Solution:
  
  Check Data: Review the data in the specified fiscal year to ensure that it is indeed supposed to have duplicates. If the data is clean and duplicates are not expected, then this error may not be a concern.
  Review NRIV Settings: Check the configuration of the Number Range Intervals (NRIV) in your SAP system. Ensure that the number ranges are set up correctly and that they allow for the expected duplicates.
  Adjust Simulation Parameters: If you are running a simulation, consider adjusting the parameters or criteria used in the simulation to better reflect the actual data conditions.
  Consult Documentation: Refer to SAP documentation or notes related to the CNV (Conversion) process for any specific guidelines or troubleshooting steps related to this error.
  Engage SAP Support: If the issue persists and you cannot determine the cause, consider reaching out to SAP support for assistance. They may provide insights specific to your system configuration and data.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional context.
  Data Migration Tools: Familiarize yourself with the tools and processes used for data migration in SAP, as understanding these can help in troubleshooting issues like this.
  Testing Environment: Always perform such simulations in a testing environment before applying changes to the production system to avoid data integrity issues.
  
  By following these steps, you should be able to identify the cause of the error and implement a suitable solution.