[Solved] PHP Fatal error: Class JoomdleModelJoomdle cannot

Everything has been working well. System Check shows fine. Students in the classes, all happy, no errors reported by students.
I went into the error log today (tracking a warning from another component about an undefined index) and saw this:

---

[06-Jan-2015 20:16:30 America/Denver] PHP Notice: Undefined offset: 1 in /home3/mysite/public_html/components/com_joomdle/controllers/ws.xmlrpc.php on line 59
[06-Jan-2015 20:18:33 America/Denver] PHP Notice: Undefined variable: token in /home3/mysite/public_html/administrator/components/com_joomdle/helpers/content.php on line 1036
[07-Jan-2015 22:48:39 America/Denver] PHP Fatal error: Class JoomdleModelJoomdle cannot extend from interface JModel in /home3/mysite/public_html/components/com_joomdle/models/joomdle.php on line 31

---

That's new. And concerning, I think?
There were some errors yesterday, but the client said she'd changed a username and generated a bunch of errors, so I ignored them. (note: I'm working on almost no sleep from a series of upgrades on other sites. So forgive how stupid that was.)
WHAT have I done now???

Are you using Joomdle 1.0?

Yes. It says so...

I guess site was upgraded from earler Joomdle version, right?
That file is not present anymore, but I guess it is kept there in upgrade process. Also, a recent Joomla update has made the problem appear (as before it was ok).

Long story short: just delete the file and you should be ok: /home3/mysite/public_html/components/com_joomdle/models/joomdle.php

Thanks, Antonio! Yes, it definitely was upgraded from a previous version. It seems like this upgrade has revealed a bunch of old files. You have a great component here. Thanks again for all of your hard work!