ArgumentError: Error #2004: One of the parameters is invalid

Just figured that Flex will start throwing this error if you don’t set the width and height your AIR application. It makes sense - an application needs to have a width and height, but for a second, I forgot that I was making an AIR app and not a Flex project.

Just thought I’d post it here in case others get the same problem. This error happens in Flex also, but for other reasons. It’s a little annoying that these error messages are so useless when they could have said something like “Required parameter missing in MXML”...