ES does not recognize an environment variable

Hello fellows,

On my Win 7 system, I've redefined the HOME environment variable as C:\Users\bnks (by default, it's C:\Documents and Settings\Users\bnks).

I'd like to save an FM file to C:\Users\bnks\Checkout\Test\, so in my extendscript, I've defined the following variable:

var docLib = "~\\Checkout\\Test\\";

where the tilde (~) should be parsed by extendscript as the HOME environment variable (according to Chapter 3, “File System Access” in the JavaScript Tools Guide).

Unfortunately, the tilde is ignored when I try to save the file:

...

var dname = docLib + rName + ".fm";

doc.Save(dname, saveParams, returnParams);

...

Any idea why this happens?

Thank you!!!