Sorry if this is the wrong place to post this. Using Datacad 17, if I have a layer with nothing in it, and it's the first layer listed, then when I select it as the only active layer Datacad hangs endlessly. This does not happen if the empty layer is not the first layer in the list. This just started happening, I think.
There is wisdom in turning as often as possible from the familiar to the unfamiliar: it keeps the mind nimble, it kills prejudice, and it fosters humor. -George Santayana