In some odd situation, SharePoint Designer (SPD) 2010 would throw this error:
“soap:Server was unable to process request. Value does not fall within the expected range”
Cause
SPD does not open the site with name it was originally defined. For example, the site was created as http://machine_name:3000/, but SPD connects it as http://localhost:3000/
Solution
SPD should connect the site with name/url defined at its creation.
The Mini's View 
Hey Buddy,
thanks for this post, I was really getting annoyed of this error. Your solution worked, but just one thing, I really dont see the difference betweeen machince name or localhost. ( weird), but this solution works 🙂
Cheers,
Kiran
Kiran,
Since IIS supports host header, which makes it possible having multiple sites with different contents referring to the same IP address. That said, when visiting http://localhost/ and http://machinename/ would be seen differently event though they both wind up in the same machine, SharePoint does not assume they mean the same site, because potentially they could be different if IIS has a host header setting.
Another solution is to add an alternate access mapping for the http://localhost: or http://machinename: in Central Admin then you can access all the content in SPD without having to think about which one to connect to.
Nice!
Hi,
I try your solution but its did not work
there is any other configuration required
Regards
Tahir
Thanks a million!
i solve the problem just change machin name to local host it will work
Thanks; my issue also resolved by your solution
Thank you.
Fantastic..fixed my issue