dmd: failed to launch executable

[Rinzler via Digitalmars-d]

> Quick point about paths and so on: if you don't understand 
> what's going on, or have just made a change and want to be sure 
> whether it worked, always open a new terminal session and try 
> again. There are caches that can need emptying, environment 
> variables that get inadvertently set etc.
> I can't count the number of times I've been convinced 
> somethings completely broken only to start a new terminal and 
> find it all makes perfect sense again.
>
> Totally simple, obvious advice, I know, but nonetheless always 
> worth repeating.

Thanks for the advice.

By the way, do you know a clean way to manage the installation 
and eventually the uninstallation of dmd, and all libraries 
related to D, etc, so that I don't have anymore these kind of 
problems?