This is with respect to 800xA MI Upload. Unable to upload particuar faceplate button to the subscriber system.

A faceplate was created for a parent single control module in a provider system. One of the buttons in the faceplate is connected to a variable 'vlHMIenable' - this variable is a local variable inone of the child single control module below the parent mentioned above. The button works fine for the faceplate in the provider 800xA system. An upload is done to the subscriber system. On checking the same faceplate in the subscriber system, the button is greyed out.

I have checked the edit permissions for the variable 'vlHMIenable' in the child single control module - the read and write are both blank.

Can someone help me understand why the button works fine on the provider system but cannot work in the subscriber system. Is this a limitation on the system ?