Tree with Dynapath will not repeat

Hi,

My Tree J-425 with Dynapath 40 controller runs good but with a snag. Every time you hit cycle start, The machine does not go to the same place twice. Machining a part that already has cut features will find the new cuts off location. Changing x and y offsets to correct the problem is of no use as the machine is always off location again. Can someone tell me where to look for a fix? Location can be off by .005 in any direction. A part machined in one set-up is better but not perfect.

Thanks!,

Erik