How To Fix CNV_DMC_MC_EXCEPTION173 - &1-&2: Source field and target field have different lengths

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_DMC_MC_EXCEPTION - Exception texts of Migration Object Modeller

• Message number: 173

• Message text: &1-&2: Source field and target field have different lengths

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_DMC_MC_EXCEPTION173 - &1-&2: Source field and target field have different lengths ?

  The SAP error message CNV_DMC_MC_EXCEPTION173 indicates that there is a mismatch in the lengths of the source field and the target field during a data migration or conversion process. This typically occurs in the context of using the SAP Data Migration Cockpit (DMC) or similar tools when transferring data from one system to another.
  Cause:
  
  Field Length Mismatch: The source field in the original system has a different length than the corresponding target field in the destination system. For example, if the source field is defined as a VARCHAR(50) and the target field is defined as VARCHAR(30), this error will occur.
  Data Type Differences: Sometimes, the data types may also differ, which can lead to length issues. For instance, a numeric field in the source may be mapped to a character field in the target.
  Configuration Issues: Incorrect mapping configurations in the migration tool can lead to this error, especially if the mappings do not account for the differences in field definitions.
  
  Solution:
  
  Check Field Definitions: Review the field definitions in both the source and target systems. Ensure that the lengths and data types match. If they do not, you may need to adjust the target field length or modify the source data accordingly.
  Adjust Mapping: In the migration tool, check the mapping configuration. Ensure that the source fields are correctly mapped to the target fields, and adjust the mappings if necessary.
  Data Transformation: If the target field cannot be changed (e.g., due to business rules), consider implementing data transformation logic to truncate or pad the source data to fit the target field length.
  Use Data Quality Tools: Utilize data quality tools to analyze the source data for any discrepancies that may cause this error. Cleanse the data as needed before migration.
  Consult Documentation: Refer to the SAP documentation for the specific migration tool you are using. There may be specific guidelines or best practices for handling field length mismatches.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance on data migration issues.
  Migration Cockpit Documentation: Review the official SAP documentation for the Data Migration Cockpit, which may provide insights into common issues and their resolutions.
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  
  By addressing the field length mismatch and ensuring proper mapping and data transformation, you should be able to resolve the CNV_DMC_MC_EXCEPTION173 error.