File save causes exception if the workflow and destination are not on the same filesystem

[0xDBFB7]

What's wrong?

Hi!

On a Windows machine, when a selected Save Data destination path and the workflow save directory are not on the same filesystem (e.g. one or both are mapped network drives), os.path.relpath on this line erros out with

ValueError: path is on mount '<drive letter>', start on mount '<drive letter>'

How can we reproduce the problem?

Create a new Workflow. Save it to a location on a certain drive. Add e.g. a Multifile widget and a Save Data widget. Set the path on the Save Data widget to a location on a different drive

(On the stated version the file picker comes back up after the exception, so it's not obvious there was an exception - on a colleague's newer version an exception box comes up.)

What's your environment?

• Operating system: Windows 10
• Orange version: Quasar 1.10.1
• How you installed Orange: Windows installer package

Sorry for the trouble - there's a very simple workaround, of course; just save to the same file system. I figured this'd probably be worth submitting anyway.

Thanks for this great software!

[0xDBFB7]

Whoops - dupe of #6685