How To Fix CNV_00001166 - Parameter/field &1 and field &2 have a different number of characters

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_00001 - Message class for CWB settings maintenance programs

• Message number: 166

• Message text: Parameter/field &1 and field &2 have a different number of characters

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_00001166 - Parameter/field &1 and field &2 have a different number of characters ?

  The SAP error message CNV_00001166 indicates that there is a mismatch in the number of characters between two fields during a data conversion or migration process. This error typically arises in the context of SAP's data migration tools, such as the SAP S/4HANA Migration Cockpit or other data transfer processes.
  Cause:
  The error occurs when:
  
  Two fields that are supposed to be compared or mapped have different lengths. For example, if one field is defined to hold 10 characters and the other is defined to hold 15 characters, this mismatch will trigger the error.
  The data being migrated or converted does not conform to the expected format or length defined in the target system.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Field Definitions: 
  
  Review the data model or structure of both the source and target systems to ensure that the fields in question are defined with compatible lengths.
  If necessary, adjust the field lengths in the target system to match those in the source system or vice versa.
  
  
  
  Data Mapping:
  
  Ensure that the mapping of fields in the migration tool is correctly set up. If the fields are supposed to be mapped, verify that the mapping is correct and that the lengths are compatible.
  
  
  
  Data Cleansing:
  
  If the data being migrated contains values that exceed the defined length of the target field, you may need to cleanse the data. This could involve truncating values, padding them, or transforming them to fit the target field's constraints.
  
  
  
  Adjust Migration Settings:
  
  In some cases, you may need to adjust the settings in the migration tool to handle the discrepancies. This could involve setting up transformation rules or using custom logic to handle the data conversion.
  
  
  
  Testing:
  
  After making adjustments, perform a test migration with a small subset of data to ensure that the changes resolve the error without introducing new issues.
  
  
  
  Related Information:
  
  Transaction Codes: You may want to use transaction codes like SE11 (Data Dictionary) to check the field definitions or SE80 (Object Navigator) to review the data model.
  SAP Notes: Check for any relevant SAP Notes that may provide additional guidance or patches related to this error.
  Documentation: Review the documentation for the specific migration tool you are using, as it may provide insights into common issues and their resolutions.
  
  By following these steps, you should be able to identify the cause of the CNV_00001166 error and implement a solution to resolve it.