# Cannot create property background\_mc on mysqlurl

**URL:** <https://forum.kirupa.com/t/cannot-create-property-background-mc-on-mysqlurl/325831>\
**Category:** flash\
**Created:** [November 7, 2011, 11:48am UTC](https://forum.kirupa.com/t/cannot-create-property-background-mc-on-mysqlurl/325831 "2011-11-07T11:48:07Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![chopficaro](https://avatars.discourse-cdn.com/v4/letter/c/5f9b8f/32.png) [@chopficaro](https://forum.kirupa.com/u/chopficaro)\
**Post date:** [November 7, 2011, 11:48am UTC](https://forum.kirupa.com/t/cannot-create-property-background-mc-on-mysqlurl/325831/1 "2011-11-07T11:48:07Z")

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there are 3 classes in my library with base class movie clip  
menucaller  
mysqlurl  
background\_mc  
menucaller and mysqlurl each have an .as file associated with them  
background\_mc is just a white square in mysqlurl  
all 3 are exported for actionscript  
on the stage i have instances of of menucaller  
on mouse over of menucaller, menucaller summons mysqlurl via the .as file  
when i publish as .swf and navigate to the frame where there are instances of menucaller, the menucallers appear just fine  
but i get the error

ReferenceError: Error #1056: Cannot create property background\_mc on mysqlurl.  
at flash.display::Sprite/constructChildren()  
at flash.display::Sprite()  
at flash.display::MovieClip()  
at mysqlurl()  
at menucaller()  
at flash.display::MovieClip/gotoAndPlay()  
at TEST1\_fla::MainTimeline/PALclickHandler()

i fixed this once before by just copying and pasting all of the layers into a new project, but its not working anymore  
please help me this error is boggling my brain  
thank you very much for your help in the past and i hope you can help me figure out this one, its the last thing to finish a huge project