There was a bug in the release version that made the `--set-cell-number` and `--plot-prefix` options incompatible. If you run without `--plot-prefix` (like in the TL;DR version of the guide) it should run fine - the plots are not required if you are fixing the number of cells anyway.
I don't quite know how this made it past our testing of the guide (which I have now updated). I apologise for that.
|