How To Fix CNV_PE818 - Field has unallowed type &1

CNV_PE818 - Overview

• 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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CNV_PE818 - Details

• 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