Message type: E = Error
Message class:  S_ILM_VIEW_UI - Messages for View Configuration in Retention Warehouse 
Message number: 011
Message text: Enter an exit class
You have specified an exit structure. To ensure that the structure is
filled at runtime, you also need to specify the corresponding exit
class.
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
Enter the name of an exit class that implements the BAPI.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message S_ILM_VIEW_UI011, which states "Enter an exit class," typically occurs in the context of Information Lifecycle Management (ILM) when you are trying to configure or manage ILM-related settings in the SAP system. This error indicates that a required field for an exit class has not been filled in.
Cause: The error is usually caused by one of the following reasons: Missing Exit Class: The exit class field is mandatory, and if it is left blank, the system will throw this error.
Configuration Issues: There may be issues with the configuration of the ILM settings where the exit class is expected but not provided. User Input Error: The user may have overlooked entering the exit class while trying to save or process ILM-related data.
Solution: To resolve the error, you can follow these steps: Enter the Exit Class: Navigate to the relevant configuration or transaction where the error occurred. Look for the field labeled "Exit Class" or similar. Enter
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