Alexey, if you try to run directly only a bxml file, like yours, or another (that is a Window or a Frame) ?
Inside eclipse you need the eclipse pivot plugin, found here: https://cwiki.apache.org/PIVOT/platform-developer-info.html inside that page you find a link to download the plugin jar, to put under eclipse/dropins , so after the restart you can try to right click a bxml file and do a Run As Pivot Script Application. It's really strange ... Could you attach here a zip containing a minimal test for your app (bxml and code ... I see that you are usinbg Scala, very good :-) ) ? To verify that it's not something related to the code. Sandro
