How To Fix CNV_10020686 - Length of passed parameter &2 and rule parameter &1 do not match

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_10020 - Message class for package 10020

• Message number: 686

• Message text: Length of passed parameter &2 and rule parameter &1 do not match

What causes this issue?

For the rule parameter &V1& the passed parameter &V2& has been assigned.
The length of the objects is mentioned in brackets and does not match.

How to fix this error?

Assign a suitable passed parameter that has the same length than the
rule parameter.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_10020686 - Length of passed parameter &2 and rule parameter &1 do not match ?

  The SAP error message CNV_10020686 indicates a mismatch between the length of a parameter being passed and the expected length defined in a rule. This error typically occurs during data migration or conversion processes, particularly when using SAP's Data Migration tools or during the execution of conversion programs.
  Cause:
  The error arises when:
  
  A parameter (usually a field or a value) is being passed to a function or a program, but its length does not match the length defined in the corresponding rule or structure.
  This can happen if the data being processed has been incorrectly formatted, truncated, or if there is a mismatch in the data model between the source and target systems.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Parameter Lengths: 
  
  Review the lengths of the parameters being passed in the program or function. Ensure that they match the expected lengths defined in the relevant data structures or rules.
  
  
  
  Data Validation:
  
  Validate the data being migrated or converted. Ensure that all fields conform to the expected formats and lengths. This may involve checking the source data for inconsistencies.
  
  
  
  Adjust Data Mapping:
  
  If you are using a mapping tool or a conversion program, check the mapping definitions. Ensure that the source fields are correctly mapped to the target fields and that their lengths are compatible.
  
  
  
  Modify the Program:
  
  If you have access to the program code, you may need to modify it to handle the parameter lengths correctly. This could involve adjusting the data types or lengths in the ABAP code.
  
  
  
  Consult Documentation:
  
  Refer to the SAP documentation or notes related to the specific migration or conversion tool you are using. There may be specific guidelines or known issues related to this error.
  
  
  
  Testing:
  
  After making adjustments, perform thorough testing to ensure that the error is resolved and that the data is being processed correctly.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may provide additional insights or fixes related to this error message.
  Data Migration Tools: Familiarize yourself with the specific data migration tools you are using (e.g., SAP S/4HANA Migration Cockpit, SAP Data Services) as they may have specific requirements or configurations.
  Community Forums: Consider searching or posting in SAP community forums or support channels for additional help from other users who may have encountered similar issues.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.