Machine with name 'someolduselessdeletedvm' not configured

[rvolgers]

This appears to be the same issue as #102, but nothing there worked for me. Still looking for a solution. (Edit: Problem has since been solved, I was clearing files in the wrong .vagrant directory. The question below is therefore still relevant but a lot less pressing for me now :) )

But more importantly, can anybody explain WHY this is a fatal error instead of a warning? I would very much like to get on with my work and solve this seemingly minor problem later. Is this problem really important enough to refuse to let the user do anything until it is fixed?