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I made a very simple circuit, with a 1KHz 5V sinewave generator, and connected it across a pair of equal 100 Ohm resistors in series. I then tried to do a time domain analysis for 50ms in .1ms timesteps. I just get a blank plot, saying "no data".

What am I doing wrong?

PS I was trying to measure the voltage at a probe at the midpoint of the two resistors.

OK, the problem was I needed at add a ground reference. All working OK now.

So here's a suggestion. When you open a new document, start it with a ground reference always in it, if one is always needed.