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Message type: E = Error
Message class: FDT_EXPRESSIONS - Formula & Derivation Tool: Expressions
Message number: 579
Message text: Comparison requires same or compatible type (position &1)
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FDT_EXPRESSIONS579
- Comparison requires same or compatible type (position &1) ?The SAP error message FDT_EXPRESSIONS579 indicates that there is a type mismatch in a comparison operation within a formula or expression in the SAP system. This typically occurs when you are trying to compare two values that are not of the same data type or are not compatible for comparison.
Cause:
The error is caused by one of the following scenarios:
- Data Type Mismatch: You are trying to compare two different data types (e.g., comparing a string with a number).
- Incompatible Types: The types being compared may not be directly compatible, even if they seem similar (e.g., comparing a date with a string representation of a date).
- Null Values: One of the values being compared may be null or undefined, leading to an invalid comparison.
Solution:
To resolve this error, you can take the following steps:
Check Data Types: Review the data types of the values being compared. Ensure that both values are of the same type or are compatible for comparison.
- For example, if you are comparing a numeric field with a string, convert the string to a number or vice versa.
Use Type Conversion Functions: If necessary, use type conversion functions to convert one of the values to the appropriate type before performing the comparison.
- For example, use
TO_NUMBER()
to convert a string to a number orTO_STRING()
to convert a number to a string.Handle Null Values: Ensure that neither of the values being compared is null. You can use conditional checks to handle null values appropriately before performing the comparison.
Review the Expression Logic: If the comparison is part of a larger expression or formula, review the entire logic to ensure that all parts of the expression are valid and compatible.
Debugging: If you are unable to identify the issue, consider using debugging tools or logs to trace the values being compared at runtime.
Related Information:
By following these steps, you should be able to identify and resolve the cause of the FDT_EXPRESSIONS579 error in your SAP environment.
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