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The alarm fitter left 5 white tags.
The Visonic remote keypad came with three tags, one each in black, red and blue
I assumed I could just register all the tags - after successfully registering 4 white ones, when I tried to add the fifth, I got the message "no free location" (there are 5 of us at home - can I really only register 4 tags?)
Anyway, thinking it through, I wanted my three kids to each have a prox tag of their own, so I successfully deleted the white tags BUT when I try to register the coloured tags (or even the white ones again) when I go through the options to "add prox tag" I just get the message now "no free location" :-(