I broke my cron...
I successfully installed a multisite drupal using sub-domains. Everything was working great. Today, I was playing around on one of the sub domains and the admin 'check status report' warning came up so I popped over to it and it said cron had not been run; so out of habit and since I wasn't entirely paying attention, I went ahead and ran it.
About a half hour later, I was back on the main site that all the sub domain multi sites run off of and of course had the same status report message. Like the sub-domain, it was saying cron needed to be run; however when I clicked 'run cron manually' it gave me the error "Cron run failed".
I assume this is because I ran cron from the sub domain on the multi site, but how do I fix this, the main site needs to be able to run cron etc thus avoiding the need from each sub domain.
Any help would be greatly appreciated; I'm worried I really screwed this up. :(
Thanks in advance!

Ok so following the advice on
Ok so following the advice on some of the other cron troubleshooting threads, I found the following:
1. It is unlikely that my error had anything to do with running cron on the multi-site sub domain.
2. Deleting
cron_semaphoreout of variables using the devel module and clearing cache alone didn't work; though it did not throw the "Cron run failed" error. It simply went to a page not found.3. Going through errors from around the time cron first failed I found the following:
file_get_contents(sites/all/modules/jquery_ui/jquery.ui/ui/minified/ui.mouse.min.js) [<a href='function.file-get-contents'>function.file-get-contents</a>]: failed to open stream: No such file or directory in <directory path>/includes/common.inc on line 2403.('directory path' substituted for the actual path for security purposes)
Keeping this in mind, I disabled jquery_ui module and then performed #2 again and this time it simply threw a blank page; however, after navigating back to the status report, I found that cron had in fact run (or at least was now reporting that it had run).
Hope this helps anyone with a similar problem.
By the way, does anyone recognize the jquery error code? Is there an easy way to fix this or should I just leave the module disabled?