How To Fix CNV_PE818 - Field has unallowed type &1

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_PE - General messages for posting engine

• Message number: 818

• Message text: Field has unallowed type &1

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_PE818 - Field has unallowed type &1 ?

  The SAP error message CNV_PE818 with the description "Field has unallowed type &1" typically occurs during data migration or conversion processes, particularly when using the SAP Landscape Transformation (SLT) or other data migration tools. This error indicates that a field in the data being processed has a data type that is not allowed or expected by the target system or the conversion logic.
  Cause:
  
  Data Type Mismatch: The field in question has a data type that is incompatible with the target structure. For example, if the source field is a character type but the target expects a numeric type, this error may occur.
  Incorrect Mapping: The mapping configuration between the source and target structures may be incorrect, leading to the assignment of an unsupported data type.
  Custom Fields: If custom fields are involved, they may not be properly defined in the target system, leading to type conflicts.
  Data Conversion Rules: The conversion rules defined in the migration process may not account for certain data types, leading to this error.
  
  Solution:
  
  Check Data Types: Review the data types of the fields in both the source and target systems. Ensure that they are compatible and that the source data can be correctly mapped to the target structure.
  Adjust Mapping: If the mapping is incorrect, adjust it to ensure that the fields are correctly aligned. This may involve changing the data type in the source or target or modifying the mapping configuration.
  Modify Conversion Logic: If the error is due to the conversion logic, you may need to modify the transformation rules to handle the specific data type correctly.
  Data Cleansing: Ensure that the data being migrated is clean and conforms to the expected formats. This may involve preprocessing the data to convert it to the correct type before migration.
  Consult Documentation: Refer to SAP documentation or notes related to the specific migration tool you are using for any known issues or additional configuration steps that may be required.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide guidance on data type compatibility issues.
  Migration Tools: Familiarize yourself with the specific migration tool you are using (e.g., SAP Data Services, SLT) and its requirements for data types.
  Testing: Conduct thorough testing of the migration process in a development or test environment before executing it in production to identify and resolve any issues early.
  
  If the problem persists after following these steps, consider reaching out to SAP support for further assistance, providing them with detailed information about the error and the context in which it occurs.