How To Fix /SCF/UI_SAPGUI_MESS009 - System error: Subcontroller class &1 does not exist

SAP Error Message - Details

• Message type: E = Error

• Message class: /SCF/UI_SAPGUI_MESS -

• Message number: 009

• Message text: System error: Subcontroller class &1 does not exist

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.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SCF/UI_SAPGUI_MESS009 - System error: Subcontroller class &1 does not exist ?

  The SAP error message /SCF/UI_SAPGUI_MESS009 System error: Subcontroller class &1 does not exist typically indicates that the system is trying to access a subcontroller class that is not defined or not available in the system. This can occur in various scenarios, particularly when working with SAP Fiori or SAP GUI applications that rely on specific controller classes.
  Causes:
  
  Missing Class: The specified subcontroller class does not exist in the system. This could be due to a missing transport or an incomplete installation.
  Incorrect Configuration: The configuration for the application may be pointing to a non-existent or incorrectly named subcontroller.
  Version Mismatch: There may be a version mismatch between the components of the application, leading to the system looking for a class that is not available in the current version.
  Transport Issues: If the application was recently transported, the transport might not have included all necessary components.
  
  Solutions:
  
  Check Class Existence: Use transaction SE80 or SE24 to check