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PC-DMIS/Romer arm issue

OK....we have recently added PC-DMIS 4.2MR1 to our Romer 3000i arm.
Everything works fine for awhile, and then something happens to cause the arm and PC-DMIS to stop communicating with each other.
It will not take hits, and the numbers showing the X,Y,Z position do not change no mater how the arm is moved.
Closing and restarting PC-DMIS seems to correct it, but it's a pain to keep doing that when conducting an inspection with a ton of features.
Is this a common issue, and if so, does anyone have a fix?
Is there a way to re-home the arm from PC-DMIS (in a menu file for example)?Confused