How To Fix W8064 - Conversion error while evaluating expression

SAP Error Message - Details

• Message type: E = Error

• Message class: W8 - Workflow: Expressions, data flow

• Message number: 064

• Message text: Conversion error while evaluating expression

Self-Explanatory Message

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• What is the cause and solution for SAP error message W8064 - Conversion error while evaluating expression ?

  SAP Error Message:
  
  W8064 - Conversion error while evaluating expression
  
  Cause:
  The error W8064 typically occurs when SAP tries to evaluate an expression (often in a condition, formula, or calculation) and encounters a data type mismatch or an invalid conversion. This means that the system expected a certain data type (e.g., numeric, date, or character), but the actual data or expression provided cannot be converted or interpreted correctly.
  Common scenarios causing this error include:
  
  Attempting to perform arithmetic operations on non-numeric fields.
  Using incompatible data types in logical or mathematical expressions.
  Incorrect formatting of date or time fields.
  Expressions referencing fields or variables that contain unexpected or invalid values.
  Concatenation or comparison of fields with incompatible types.
  
  
  Solution:
  To resolve the W8064 Conversion error, follow these steps:
  
  
  Check the Expression Syntax:
  
  Review the expression or formula causing the error.
  Ensure that all operands are of compatible data types.
  Verify that numeric operations are only performed on numeric fields.
  
  
  
  Validate Data Types:
  
  Confirm the data types of all fields or variables used in the expression.
  Use explicit conversion functions if necessary, such as:
  
  CONV to convert data types explicitly.
  TO_DATE or TO_NUMBER functions where applicable.
  
  
  
  
  
  Check Field Contents:
  
  Inspect the actual data values in the fields involved.
  Look for invalid or unexpected data (e.g., alphabetic characters in numeric fields).
  
  
  
  Use Debugging Tools:
  
  Use the ABAP debugger or trace tools to identify the exact point of failure.
  Check the runtime values of variables and fields.
  
  
  
  Correct the Expression Logic:
  
  Modify the expression to handle possible null or invalid values.
  Add validation or error handling to prevent invalid conversions.
  
  
  
  Consult SAP Notes:
  
  Search for relevant SAP Notes or Knowledge Base Articles for your specific module or transaction.
  
  
  
  
  Related Information:
  
  
  Where it commonly occurs:
  
  In ABAP programs, especially in WHERE clauses, IF conditions, or calculations.
  In SAP Query or Report Painter/Writer formulas.
  In condition records or pricing procedures where expressions are evaluated.
  In user exits or BADIs where custom code evaluates expressions.
  
  
  
  Example:
  Suppose you have an expression like:
  IF lv_char_field + 1 > 10.
  If lv_char_field contains non-numeric characters, the system cannot convert it to a number, causing the conversion error.
  
  
  SAP Notes and Documentation:
  
  Check SAP Note 00008064 (if exists) or search the SAP Support Portal with the error code.
  Review SAP Help Portal documentation on data type conversions and expression evaluation.
  
  
  
  
  Summary:
  W8064 Conversion error while evaluating expression is caused by incompatible data types or invalid data during expression evaluation. The solution involves verifying and correcting data types, ensuring valid data, and adjusting the expression logic to prevent invalid conversions.
  
  If you provide the exact expression or context where the error occurs, I can help you analyze it more specifically.