How To Fix WER278 - Parameter &1 is not assignable

WER278 - Overview

• Message type: E = Error

• Message class: WER - Messages for the package WER

• Message number: 278

• Message text: Parameter &1 is not assignable

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message WER278 - Parameter &1 is not assignable ?

  Certainly! Here's a detailed explanation for the SAP error message WER278: Parameter &1 is not assignable:
  
  Error Message
  WER278: Parameter &1 is not assignable
  
  Cause
  This error occurs when there is an attempt to assign a value to a parameter that is defined as importing or changing in a function module or method, but the parameter is either:
  
  Not declared as assignable (e.g., it is an importing parameter which is not allowed to be changed inside the function module),
  Or the parameter is passed by value and not by reference,
  Or the parameter is read-only in the current context.
  
  In ABAP, parameters in function modules or methods can be defined as:
  
  IMPORTING (input only, not assignable),
  EXPORTING (output only),
  CHANGING (input/output, assignable),
  TABLES (special type, assignable).
  
  If you try to assign a value to an IMPORTING parameter or a parameter that is not declared as CHANGING or TABLES, the system raises this error.
  
  Typical Scenario
  
  You have a function module or method with an IMPORTING