I am touching a previous created ArcGIS viewer with API 3.6A. When I loaded the file, I got 100 errors. E.g. Description Resource Path Location Type 1017: The definition of base class Object was not found. IBaseWidget.as /PrestonCountyGIS/src/com/esri/solutions/flexviewer line 1 Flex Problem 1046: Type was not found or was not a compile-time constant: [flash.display]::IBitmapDrawable. PrestonCountyGIS Unknown Flex Problem How can these errors be elimiated? Thanks.