ever since I upgraded to the latest nightly builds about two weeks ago (SDK 4.1) I get the error mentioned above, and the design mode of Flash Builder 4 Beta 2 doesn't work any more:
Design mode could not load he.enwipe.core.swc. It may be incompatible with this SDK, or invalid. (DesignAssetLoader.CompleteTimeout)
Design mode could not load PureMVC_AS3_MultiCore_1_0_5.swc. It may be incompatible with this SDK, or invalid. (DesignAssetLoader.CompleteTimeout)
and also all other "swc" inside my project that do not come directly from the SDK or Flash Builder.
Any ideas what could be the cause?
Did you switch your projects build option to merge into code rather than have runtime libraries generated.
[edit'] I really should sleep a bit more- I miss read the question, but you will probably need to break down your project to see what the issue is mxml by mxml, one thing is that any mxml headers need to halo name space renamed to mx.
as below -