How To Fix SCRL555 - Only importing parameters may be declared optional.

SCRL555 - Overview

• Message type: E = Error

• Message class: SCRL - Messages for custom resuse libraries

• Message number: 555

• Message text: Only importing parameters may be declared optional.

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SCRL555 - Only importing parameters may be declared optional. ?

  The SAP error message SCRL555, which states "Only importing parameters may be declared optional," typically occurs in ABAP when you are defining a method or function module and you attempt to declare an optional parameter that is not an importing parameter. 
  
  Cause:
  In ABAP, when defining methods or function modules, parameters can be categorized as:
  
  Importing: Parameters that are passed into the method/function.
  Exporting: Parameters that are returned from the method/function.
  Changing: Parameters that can be both input and output.
  Tables: Parameters that are used to pass internal tables.
  
  The error SCRL555 arises when you try to declare an optional parameter that is not of the importing type. Only importing parameters can be declared as optional. For example, if you try to declare an optional exporting or changing parameter, you will encounter this error.
  
  Solution:
  To resolve this error, you need to ensure that only importing parameters are declared as optional. Here’s how you can do that:
  
  
  Check Parameter