Message type: E = Error
Message class:  SEEF_BADI - Messages on BAdIs 
Message number: 018
Message text: No interface exists for BAdI &1
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The SAP error message SEEF_BADI018 "No interface exists for BAdI &1" typically occurs when you are trying to implement or use a Business Add-In (BAdI) that does not have a corresponding interface defined in the system. This can happen for several reasons, and here are some potential causes, solutions, and related information: Causes: BAdI Not Defined Properly: The BAdI you are trying to use may not have been defined correctly in the system. Missing Interface: The interface that the BAdI is supposed to implement may not exist or may not have been activated. Incorrect BAdI Name: There might be a typo or incorrect name used when trying to access the BAdI. Transport Issues: If the BAdI was transported from another system, it may not have been transported correctly, leading to missing components. Versioning Issues: If the BAdI has multiple versions, you might be trying to access a version that does not have an interface defined. Solutions: Check BAdI
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