So apparently this error is as a result of comparing bitmap from images of different sizes.
To: flexcoders@yahoogroups.com From: loudj...@hotmail.com Date: Tue, 1 Nov 2011 22:54:27 +0000 Subject: [flexcoders] Error comparing bitmapData I'm getting this error when comparing (what appears to be) two valid BitmapData objects, any ideas why? Type Coercion failed: cannot convert -3 to flash.display.BitmapData. code: var diff:BitmapData = BitmapData(this._editorBitmapData.compare(this._iceBitmapData)); Cheers, Philip