Cron - Fatal error: Call to a member function getURLs()

I have a strange error that started happening this morning. Not sure what it is really causing, but I am getting Cron Daemon emails about it with the error:

    Fatal error: Call to a member function getURLs() on a non-object in /home/websites/mysource_matrix/core/assets/system/cron/jobs/cron_job_refresh_cache/cron_job_refresh_cache.inc on line 101

I realized we moved around some assets and an old asset had a refresh cron job on it, when the asset was no longer in the system. This seems like it should have fixed the error, but the emails persist.

Ok, after digging through 36 pages in the cron manager, I found job and removed it. Problem solved.