Can you please re-post the LVOOP DLL - the example vi appears to be blank.
I've tried creating my own example vi that uses a Call Library Function Node. The DVR value looks ok, but using it as an input for the external accessors compiled into the DLL does not work.
Jarrod Posted that example about 2 years ago so he may not still have it. I'll try to get in touch with him but you may be out of luck with respect to that particular example. Did you have any questions about it?
Thanks for the reply.
I've been struggling to get the Call Library Function parameter types to work with Data Value References to LabVIEW class objects.
I've just raised a support call with NI to try and solve this.
I'll post any answers I get.