adobe flash actionscript 3 TypeError: Error #2007: Parameter child must be non-null.

adobe flash actionscript 3 TypeError: Error #2007: Parameter child must be
non-null.

References

Reference NO 1

http://stackoverflow.com/questions/15191872/adobe-flash-actionscript-3-typeerror-error-2007-parameter-child-must-be-non-n

Reference NO 2

http://stackoverflow.com/questions/11389313/typeerror-error-2007-parameter-text-must-be-non-null

Reference NO 3

http://forums.adobe.com/message/5599915

Reference NO 4

http://www.gotoandlearnforum.com/viewtopic.php?t=27839

Reference NO 5

http://geek.michaelgrace.org/category/actionscript-flash/

Reference NO 6

http://www.actionscript.org/forums/showthread.php3?t=148316

Reference NO 7

http://www.kongregate.com/forums/4/topics/148619

Reference NO 8

http://flash.bigresource.com/ActionScript-3-0-CellRenderer-is-not-displaying-icons-in-a-loaded-swf-throws-null-child-addChildAt-LqGP30ENE.html