How To Fix BRF658 - System unable to interpret parts of the expression '&1'

BRF658 - Overview

• Message type: E = Error

• Message class: BRF - Messages for Business Rule Framework

• Message number: 658

• Message text: System unable to interpret parts of the expression '&1'

What causes this issue?

Expression &v1& contains elements that the system is unable to
interpret.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Perform one of the following activities:
Change expression &v1& so that these elements are no longer used.
Create the expression manually in the Formula & Derivation Tool (FDT).

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message BRF658 - System unable to interpret parts of the expression '&1' ?

  The SAP error message BRF658, which states "System unable to interpret parts of the expression '&1'," typically occurs in the context of Business Rule Framework (BRF) when there is an issue with the expression or rule definition that the system is trying to evaluate. Here’s a breakdown of the potential causes, solutions, and related information for this error:
  Causes:
  
  Syntax Errors: There may be a syntax error in the expression or rule definition. This could include missing operators, incorrect function calls, or improperly formatted expressions.
  Invalid Data Types: The expression may be using data types that are incompatible with the expected input or output types.
  Missing Variables or Constants: The expression might reference variables or constants that are not defined or are incorrectly referenced.
  Logical Errors: There could be logical errors in the way the expression is constructed, leading to an inability for the system to interpret it correctly.
  Versioning Issues: If there have been recent