Remove Child after Adding Child Issue

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ok here goes. helped extremely before on problem while testing , checking output window following error:

typeerror: error #2007: parameter child must non-null.
@ flash.display::displayobjectcontainer/removechild()
@ final2fla_fla::maintimeline/reportdowncdromclick()

this happens when click on reportdowncdromclick button (button2) not on other. working with:




this because loaders being created when click on web button , trying remove non-existent loaders. have create booleans other buttons.


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