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[jacq1960]

Dear DrD

Thanks a million for your advice which worked a treat! At this moment you are my personal hero.

I didn't actually put the Prime in exam mode, I was trying to find a way of putting a non numeric item in a matrix when it suddenly reset. After it recovered, it went into exam mode on its own.

Yes, just attaching the USB cable and plugging it into my MAC which did not have connectivity kit fixed it immediately.

Thanks!
Jacqualine