How To Fix /AIF/UI026 - &1 not found in program &2/screen &3; invalid selection parameter

/AIF/UI026 - Overview

• Message type: E = Error

• Message class: /AIF/UI -

• Message number: 026

• Message text: &1 not found in program &2/screen &3; invalid selection parameter

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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/AIF/UI026 - Details

• The SAP error message /AIF/UI026 &1 not found in program &2/screen &3; invalid selection parameter typically occurs in the context of the Application Interface Framework (AIF) when there is an issue with the selection parameters used in a program or screen. Here’s a breakdown of the potential causes, solutions, and related information for this error:
  Causes:
  
  Invalid Selection Parameter: The parameter you are trying to use in the selection screen does not exist or is not defined correctly in the program.
  Program or Screen Mismatch: The program or screen you are referencing may not be correctly linked to the selection parameters you are trying to use.
  
  Configuration Issues: There may be issues with the configuration of the AIF or the specific interface you are working with.
  Authorization Issues: Lack of proper authorizations to access certain programs or screens can also lead to this error.
  Data Consistency Issues: If the data being processed does not match the