Junk Numbers and no Plot in Signal View

[stellarpower]

I encounter something like this pretty frequently when adding a new View node. Not managed to work out what reproduces it yet. The more channels I have, the more likely it is to occur, but it doesn't seem to be like it's hitting a maximum - it just cropped up when I only have three in view.

[stellarpower]

Note to self: I think this may go away if I just reset the engine; TODO - check this and comment if so.

[stellarpower]

For reference, this is due to a bad range - the channel is returning +/- DBL_MAX for the maximum and minimum samples, and this overflows the string buffers hence the plot occupies well off the screen boundaries trying to write the voltages.