<model> does not have the current "<conductance>" labelled, but you have requested a block on this channel

Not 100% sure on this, but it looks like the simulation runs for conc 0 and fails on conc 0.001, but the error gets written to `chaste_errors_0.txt`, not `chaste_errors_0.001.txt`!

`--model 1 --pacing-freq 1.0 --pacing-max-time 5 --pic50-nal 1 --hill-nal 1 --saturation-nal 0 --plasma-conc-high 100 --plasma-conc-low 0 --plasma-conc-count 4 --plasma-conc-logscale true`