RavensFan,
sorry for the late reply (had vacation and a lot of stuff to do before that).
Unfortunately I am not able to reproduce how I build this vi. I started with the example at http://www.ni.com/white-paper/9387/en. This is defective (different number out terminals in the vi itself and its recurive calls). But even if I start with the defective wiring I end up with a correct working version. I will try to to investigate this a bit further.
I use LV 2012 SP1 (not sure which fix).
I would appreciate if this is investigated by NI any further, because I do not want this problem to occur in a real project.
Regards
Lars