How To Fix K7220 - Optional variables and select options may not be used here

K7220 - Overview

• Message type: E = Error

• Message class: K7 - Messages for Row/Column Structure

• Message number: 220

• Message text: Optional variables and select options may not be used here

What causes this issue?

You want to use a global variable with an optional replacement type
(optional variable) or a select option. However, given that a unique,
single input value is required that should also not be initial, these
variables are not permitted here. For this reason, you should use more
suitable variables.

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?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

K7220 - Details

• The SAP error message K7220, which states "Optional variables and select options may not be used here," typically occurs in the context of SAP ABAP programming, particularly when dealing with selection screens or report parameters. This error indicates that the code is attempting to use optional variables or select options in a context where they are not allowed.
  
  Cause:
  
  Incorrect Context: The error usually arises when optional variables or select options are used in a place where only fixed values or specific types of parameters are expected. For example, this can happen in certain function modules or when trying to pass parameters to a report that does not support them.
  Improper Declaration: If the optional variables or select options are not declared correctly or are being used in a way that is not compatible with the expected input types, this error can occur.
  
  
  Solution:
  
  Check Context: Review the context in which you are using the