I'm having issues displaying a simple message box to the player after activating a dummy activator. I've created a new message object (with the option "Message Box" checked, title filled, and text filled) that will only display a message box with no options.

Here's the script attached to the activator. I've replaced the noItemMsg.show() with Debug.MessageBox("Testing") to check if it was a logic or OnActivate block issue and that worked:

Scriptname TestSCRIPT extends ObjectReference  ;;; Properties ;;;Form property item autoMessage property noItemMsg autoEvent OnActivate(ObjectReference akActionRef)	if (akActionRef == Game.getPlayer())		; Get item		item = getNthLinkedRef(2).getBaseObject()				; Item not present		if (getLinkedRef().isDisabled())			; PC has item			if (akActionRef.getItemCount(item) > 0)				akActionRef.removeItem(item)				getLinkedRef().enable()			; PC doesnt have item			else				noItemMsg.show()			endif		; Item is present		else			getLinkedRef().disable()			akActionRef.addItem(item)		endif	endifEndEvent

Did you make sure to set the property to your message?

Yes, the noItemMsg property was set to point to the base object message.

I went ahead and created a new script and message box and everything works now.