How To Fix CNV_DMC_MC_EXCEPTION131 - Data type & is not compatible with data type &2 of value table &3

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 131

• Message text: Data type & is not compatible with data type &2 of value table &3

The data type of the fixed value must be compatible with the data type
for the value table / field. Currently, they are not compatible (the
data types and lengths are not the same):
Data type and length of fixed value ZPHOTEST: CHAR, 6
Data type and length for value table MARA / field MATNR: CHAR, 4

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_DMC_MC_EXCEPTION131 - Data type & is not compatible with data type &2 of value table &3 ?

  The SAP error message CNV_DMC_MC_EXCEPTION131 indicates a data type mismatch during a data migration or conversion process. This error typically occurs when the data type of a field in the source system does not match the expected data type in the target system's value table. Here’s a breakdown of the cause, potential solutions, and related information:
  Cause:
  
  Data Type Mismatch: The source field's data type is incompatible with the target field's data type. For example, a character field in the source may be trying to map to a numeric field in the target.
  Value Table Issues: The value table specified may have a different structure or data type than what is expected.
  Configuration Errors: Incorrect configuration in the data migration settings or mapping definitions can lead to this error.
  Data Quality Issues: The data in the source system may not conform to the expected formats or types, leading to incompatibility.
  
  Solution:
  
  Check Data Types: Review the data types of the fields in both the source and target systems. Ensure that they are compatible. You can do this by checking the data dictionary (SE11) for the relevant tables.
  Adjust Mapping: If you are using a data migration tool (like SAP S/4HANA Migration Cockpit or SAP Data Services), check the mapping configuration. Ensure that the source fields are correctly mapped to the target fields with compatible data types.
  Data Cleansing: If the source data contains values that do not conform to the expected data types, you may need to cleanse the data. This could involve converting character strings to numbers or vice versa, or ensuring that date formats are consistent.
  Modify Value Table: If necessary, you may need to adjust the value table in the target system to accept the data types from the source. This could involve changing the field definitions in the target table.
  Consult Documentation: Refer to SAP documentation or notes related to the specific migration or conversion process you are using. There may be specific guidelines or known issues related to the error.
  
  Related Information:
  
  Transaction Codes: Use transaction codes like SE11 (Data Dictionary), SE80 (Object Navigator), or ST22 (Dump Analysis) to investigate further.
  SAP Notes: Check for relevant SAP Notes that may address this specific error or provide additional guidance.
  Data Migration Tools: Familiarize yourself with the data migration tools you are using, as they often have specific requirements and configurations that need to be adhered to.
  Testing: Always perform testing in a development or quality assurance environment before executing data migrations in production to catch these types of errors early.
  
  By following these steps, you should be able to identify the root cause of the CNV_DMC_MC_EXCEPTION131 error and implement a solution to resolve it.