How To Fix /UI2/PAGE057 - The ID must start with Z or Y and may be up to 32 characters long.

/UI2/PAGE057 - Overview

• Message type: E = Error

• Message class: /UI2/PAGE -

• Message number: 057

• Message text: The ID must start with Z or Y and may be up to 32 characters long.

Self-Explanatory Message

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/UI2/PAGE057 - Details

• The SAP error message /UI2/PAGE057 indicates that there is an issue with the ID of a custom Fiori application or UI5 application. Specifically, the error states that the ID must start with either "Z" or "Y" and can be up to 32 characters long. This is a common requirement in SAP systems to differentiate custom objects from standard ones.
  
  Cause:
  
  Invalid ID Format: The ID you are trying to use for your custom application does not start with "Z" or "Y". SAP reserves the prefixes "Z" and "Y" for custom developments, while standard objects typically do not use these prefixes.
  Length Exceeded: The ID exceeds the maximum allowed length of 32 characters.
  Typographical Error: There may be a typographical error in the ID that you are trying to use.
  
  
  Solution:
  
  Change the ID: Ensure that the ID you are using for your custom application starts with "Z" or "Y". For example, if your current ID is