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Once you switch to Flex 3, can you please make sure you recompile all the modules and main app. Can you do a a clean and recompile? It can be done from Project-> Clean (Also select build automatically)
That brings me back to the error:
Argument count mismatch on mx.binding::PropertyWatcher(). Expected 3, got 2.
I'm assuming you meant for me to recompile with flex 3 SDK, not 2.0.1?
Yes I meant Flex 3.
Is Module also part of the same project? if not can you also recompile that as well using flex 3. Also if there are any libraries - I would suggest you recompile those as well.
BaileyBurger, I am having the same issues... except I developed my app in Flex 3. When i move it to Flex 2 build 3, it works. I cannot seem to find any other documentation on this issue, were you able to solve it?
'faid not. Had to rebuild the project in flex 3.
Check your Project properties-->FLEX Build path-->TAB Library Path
Make sure you're using the correct library.
I know this is an old topic, but just in case anyone else finds there way here. It looks like the opensource part of Adobe has usurped flexunit,
this article is the needful
There is a link for the SWC but it is old, below will save you a click.
You should remove all your old FlexUnit libraries and replace with the one FlexUnit.swc (originally flexunit.swc). You will have a minor difference in the TestRunner.mxml, just grab the one form the above blog.