How To Fix GB027 - Exit & has the incorrect type

GB027 - Overview

• Message type: E = Error

• Message class: GB - Messages used by the Boolean code generator

• Message number: 027

• Message text: Exit & has the incorrect type

What causes this issue?

The exit type of the system exit or user exit cannot be used in this
condition.
This may be the case, if:
in a condition, you have used a user exit that does not match your
validation or substitution callup point.
&BEISPIEL& In FI, you cannot use a
user exit
that refers to the complete document structure for callup point
"document line".
in the substitution, you have used a user exit whose definition of the
parameters (in the FORM routine GET_EXIT_TITLES) does not coincide with
how it is used.
&BEISPIEL& If you select the option "Only exit" when choosing the
substitution fields,
you cannot enter a user exit that is defined with a parameter.

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

System Response

How to fix this error?

Use a different exit or check the definition in the exit form pool.
The routine GET_EXIT_TITLES in the form pool specifies the exit type.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message GB027 - Exit & has the incorrect type ?

  The SAP error message GB027, which states "Exit & has the incorrect type," typically occurs in the context of SAP's enhancement framework, particularly when dealing with user exits or customer exits. This error indicates that there is a mismatch between the expected type of the exit and the type that has been defined or implemented.
  
  Cause:
  
  Incorrect Exit Type: The exit that is being called or referenced does not match the expected type. For example, if a function module is expected but a subroutine is provided, this error can occur.
  
  Configuration Issues: There may be issues in the configuration of the user exit or enhancement, leading to the system not recognizing the exit correctly.
  Implementation Errors: If the exit has been implemented incorrectly or if there are changes in the code that do not align with the expected signature of the exit, this error can arise.
  Version Mismatch: If there are different versions of the