Thanks Robert for looking at this. I've had warnings pop up in my console about some of the esri classes I'm importing. Warnings such as: The class com.esri.ags.geometry.MapPoint has been used in a call to net.registerClassAlias() in _ModRound2Form_FlexInit. This will cause Round2Form:ModRound2Form to be leaked. To resolve the leak, define com.esri.ags.geometry.MapPoint in the top-level application. I ran into the same problem with mx.messaging.messages.SOAPMessage and some custom widgets. I'm using FB 4.6 and Flex Viewer 3.0. Problem did not arise wth FB 4.1 and Flex Viewer 2.3.1. Not only did I have to import the class into index.mxml as Robert pointed out but I also had to create a variable of the same class to fix the problem (no error messages in debug console): import mx.messaging.messages.SOAPMessage; private var _dummy:SOAPMessage; John Campbell GIS Application Developer Kingston, Ontario, Canada geospatialweb.ca
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