# A copy of ApplicationController has been removed from the module tree but is still active

**URL:** <https://www.ruby-forum.com/t/a-copy-of-applicationcontroller-has-been-removed-from-the-module-tree-but-is-still-active/171470>\
**Category:** Rails\
**Created:** [July 3, 2009, 2:58am UTC](https://www.ruby-forum.com/t/a-copy-of-applicationcontroller-has-been-removed-from-the-module-tree-but-is-still-active/171470 "2009-07-03T02:58:34Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![kopf1988](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/k/74df32/32.png) [@kopf1988](https://www.ruby-forum.com/u/kopf1988)\
**Post date:** [July 3, 2009, 2:58am UTC](https://www.ruby-forum.com/t/a-copy-of-applicationcontroller-has-been-removed-from-the-module-tree-but-is-still-active/171470/1 "2009-07-03T02:58:34Z")

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Hi,

I’ve been getting weird errors like the title ever since using rufus-  
scheduler, although I haven’t conclusively proven it to be the  
problem. I also noticed, though, that rufus schedule gave errors like

“undefined method ‘parsetweet’ for #Twitteraccount:0xbddfdf (snip)  
in method\_missing (snip) twitteraccount.rb” or something similar, even  
though it’s very clearly defined in Twitteraccount.rb. Has anyone  
experienced similar problems?

-Ryan

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**Author:** ![kopf1988](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/k/74df32/32.png) [@kopf1988](https://www.ruby-forum.com/u/kopf1988)\
**Post date:** [July 3, 2009, 2:59am UTC](https://www.ruby-forum.com/t/a-copy-of-applicationcontroller-has-been-removed-from-the-module-tree-but-is-still-active/171470/2 "2009-07-03T02:59:10Z")

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“undefined method ‘parsetweet’ for #Twitteraccount:0xbddfdf (snip)  
in method\_missing (snip) twitteraccount.rb” or something similar,  
even  
though it’s very clearly defined in Twitteraccount.rb. Has anyone  
experienced similar problems? This error message shows up when rufus-  
scheduler is called to do something on a Twitteraccount. Strange thing  
is… it works, sometimes, sometimes it doesn’t.

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**Author:** ![kopf1988](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/k/74df32/32.png) [@kopf1988](https://www.ruby-forum.com/u/kopf1988)\
**Post date:** [July 4, 2009, 12:19am UTC](https://www.ruby-forum.com/t/a-copy-of-applicationcontroller-has-been-removed-from-the-module-tree-but-is-still-active/171470/3 "2009-07-04T00:19:35Z")

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Something’s going on with the class loader; are you running in  
development mode?

More info on the particular versions involved will also help, as will  
_not_ snipping out bits of the error messages.

–Matt J.