Facing MemberAccessDeniedException while executing copyAttribute

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Question: I'm experiencing issues copying attributes from `system.FileDocument` to `MyfirstModule.PDF` which has generalization of Filedocument using a Java action. Specifically, I'm encountering a `MemberAccessDeniedException` when attempting to write to the `HasContents` member of `MyfirstModule.PDF`. The error occurs in the `Retrieve_PDF` microflow. Context: The error occurs when executing the `Retrieve_PDF` microflow. No further details are available about the specific operation causing the issue. Error Message: Caused by: com.mendix.modules.microflowengine.MicroflowException: com.mendix.systemwideinterfaces.MendixRuntimeException: com.mendix.basis.objectmanagement.member.MemberAccessDeniedException: Write access denied for member 'HasContents' of object 'MyfirstModule.PDF' at MyfirstModule.Retrieve_PDF.nested.cad89dc2-6f7e-4d94-aed3-4c6f66f72377 [0 of 1] (JavaAction :
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I suspect that the security for this field is implemented in such a way that this is never writable by a user and the field is populated only by the system that determines if there is content in the file object.

So in the java action you should implement a skip for this attribute.

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