>If I do this...
>set default to C:\Windows\Temp
>
>and after this...
>?set("default")
>
>it returns only C:
>but the setting to complete path is ok in my test.
>
>Is it normal? And why?

Yes, it's normal. I don't think SET DEFAULT is not really ment to change directoty, although you can, use CD in stead. Use FullPath('') to get what you really want.