# Problems: loaded SWF cannot add movie from library

**URL:** <https://forum.kirupa.com/t/problems-loaded-swf-cannot-add-movie-from-library/318829>\
**Category:** flash\
**Created:** [January 31, 2011, 9:34pm UTC](https://forum.kirupa.com/t/problems-loaded-swf-cannot-add-movie-from-library/318829 "2011-01-31T21:34:01Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![marceloreborn](https://avatars.discourse-cdn.com/v4/letter/m/278dde/32.png) [@marceloreborn](https://forum.kirupa.com/u/marceloreborn)\
**Post date:** [January 31, 2011, 9:34pm UTC](https://forum.kirupa.com/t/problems-loaded-swf-cannot-add-movie-from-library/318829/1 "2011-01-31T21:34:01Z")

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Hi!

I have a “Main” swf, which loads “Site” swf.

“Site” is a normal movie, with it’s Document Class. When I run it alone, it works fine, adding a movieclip from library into it’s stage.

But when I run “Main”, it show me an error: **1180: Call to a possibly undefined method mcSiteInside.**  
“mcSiteInside” is a Movieclip, from Site’s Library.