hp35s vector input bug semi-workaround?

[pkh]

I should also mention that the memory was anything but full when the error appears. I had plenty of available memory (~29.8k free) and variables were cleared to see if that made any difference (which it didn't). It's only when there's a certain amount of equations filling the memory, but not many.

Also, I've been saying 'matrix' when I mean 'vector', but it's all the same in these instances.