How To Fix 26090 - Enter AScEx when entering screen number

26090 - Overview

• Message type: E = Error

• Message class: 26 - Dokumentenverwaltung

• Message number: 090

• Message text: Enter AScEx when entering screen number

What causes this issue?

You have entered a screen which is to replace the standard <ZH>Basic
data</> screen 0101 in program SAPLCV00 for the document type.

System Response

The system requires an entry for the program in which the PBO and PIA
form routines for the alternative screen are processed.

How to fix this error?

In field <ZH>AScEx</>, enter the name of the program which processes
the alternative screen.

Error message extract from SAP system. Copyright SAP SE.

26090 - Details

• The SAP error message "26090 Enter AScEx" typically occurs when there is an issue with the screen number or the transaction code being used in the SAP system. This error is often related to the configuration of the SAP GUI or the specific transaction you are trying to access.
  
  Cause:
  
  Invalid Screen Number: The screen number you are trying to enter may not be valid or does not exist in the system.
  Authorization Issues: You may not have the necessary authorizations to access the specific screen or transaction.
  
  Configuration Issues: There may be a problem with the configuration of the SAP GUI or the specific transaction code.
  System Errors: There could be underlying system errors or inconsistencies in the SAP environment.
  
  
  Solution:
  
  Check Screen Number: Ensure that the screen number you are entering is correct and exists in the system. You can verify this by checking the transaction code associated with the screen.
  Verify Authorizations: Check if you