If I open your project and then adjust the sdk paths then build I get the same error in my off-list email.
I repeat the trace here. Information:[MySite]: Starting Flex compiler: "C:\Program Files\JetBrains\IntelliJ IDEA 2017.2.3\jre64\bin\java.exe" -Dapplication.home=C:\FlexJSSDKs\0.9.0 -Dfile.encoding=UTF-8 -Djava.awt.headless=true -Duser.language=en -Duser.region=en -Xmx512m -classpath "C:\Program Files\JetBrains\IntelliJ IDEA 2017.2.3\plugins\flex\lib\idea-flex-compiler-fix.jar;C:\Program Files\JetBrains\IntelliJ IDEA 2017.2.3\plugins\flex\lib\flex-compiler.jar;C:\FlexJSSDKs\0.9.0\lib\flex-compiler-oem.jar" com.intellij.flex.compiler.FlexCompiler 52838 Information:[MySite]: mxmlc -load-config=C:\Users\Doug\.IntelliJIdea2017.2\system\compile-server\mysite_e8d3b3ca\_temp_\IntelliJ_IDEA\idea-79EF1DF0-2F7BBC26.xml -load-config+=C:/FlexJSSDKs/0.9.0/ide/IDEA/intellij-config.xml -targets=JSFlex,SWF -external-library-path+=C:/FlexJSSDKs/0.9.0/js/libs/js.swc -allow-subclass-overrides=true Information:[MySite]: Compilation failed Information:08/09/2017 13:58 - Compilation completed with 2 errors and 17 warnings in 3s 988ms Error:[MySite]: : Unexpected exception 'java.lang.NullPointerException'. C:\FlexJSProjects\MySite\MySite\src\MySite.mxml Error:(5, 12) [MySite]: This tag could not be resolved to an ActionScript class. It will be ignored. C:\FlexJSSDKs\0.9.0\frameworks\libs\Basic.swc Warning:[MySite]: The definition org.apache.flex.core.IApplicationView depended on by org.apache.flex.core.Application in the SWC C:\FlexJSSDKs\0.9.0\frameworks\libs\Basic.swc could not be found Warning:[MySite]: The definition org.apache.flex.core.IInitialViewApplication depended on by org.apache.flex.core.Application in the SWC C:\FlexJSSDKs\0.9.0\frameworks\libs\Basic.swc could not be found Warning:[MySite]: The definition org.apache.flex.core.IStrand depended on by org.apache.flex.core.Application in the SWC C:\FlexJSSDKs\0.9.0\frameworks\libs\Basic.swc could not be found Warning:[MySite]: The definition org.apache.flex.core.IBead depended on by org.apache.flex.core.Application in the SWC C:\FlexJSSDKs\0.9.0\frameworks\libs\Basic.swc could not be found Warning:[MySite]: The definition org.apache.flex.core.IValuesImpl depended on by org.apache.flex.core.Application in the SWC C:\FlexJSSDKs\0.9.0\frameworks\libs\Basic.swc could not be found Warning:[MySite]: The definition org.apache.flex.events.IEventDispatcher depended on by org.apache.flex.core.Application in the SWC C:\FlexJSSDKs\0.9.0\frameworks\libs\Basic.swc could not be found Warning:[MySite]: The definition org.apache.flex.core.IChild depended on by org.apache.flex.core.Application in the SWC C:\FlexJSSDKs\0.9.0\frameworks\libs\Basic.swc could not be found Warning:[MySite]: The definition org.apache.flex.utils.MXMLDataInterpreter depended on by org.apache.flex.core.Application in the SWC C:\FlexJSSDKs\0.9.0\frameworks\libs\Basic.swc could not be found Warning:[MySite]: The definition org.apache.flex.core.ValuesManager depended on by org.apache.flex.core.Application in the SWC C:\FlexJSSDKs\0.9.0\frameworks\libs\Basic.swc could not be found Warning:[MySite]: The definition org.apache.flex.events.Event depended on by org.apache.flex.core.Application in the SWC C:\FlexJSSDKs\0.9.0\frameworks\libs\Basic.swc could not be found Warning:[MySite]: The definition org.apache.flex.core.IParent depended on by org.apache.flex.core.Application in the SWC C:\FlexJSSDKs\0.9.0\frameworks\libs\Basic.swc could not be found Warning:[MySite]: The definition org.apache.flex.core.IPopUpHost depended on by org.apache.flex.core.Application in the SWC C:\FlexJSSDKs\0.9.0\frameworks\libs\Basic.swc could not be found Warning:[MySite]: The definition org.apache.flex.core.IRenderedObject depended on by org.apache.flex.core.Application in the SWC C:\FlexJSSDKs\0.9.0\frameworks\libs\Basic.swc could not be found Warning:[MySite]: The definition org.apache.flex.core.IUIBase depended on by org.apache.flex.core.Application in the SWC C:\FlexJSSDKs\0.9.0\frameworks\libs\Basic.swc could not be found Warning:[MySite]: The definition org.apache.flex.core.ILayoutChild depended on by org.apache.flex.core.Application in the SWC C:\FlexJSSDKs\0.9.0\frameworks\libs\Basic.swc could not be found Warning:[MySite]: The definition org.apache.flex.events.utils.MouseEventConverter depended on by org.apache.flex.core.Application in the SWC C:\FlexJSSDKs\0.9.0\frameworks\libs\Basic.swc could not be found Warning:[MySite]: The definition org.apache.flex.core.IFlexInfo depended on by org.apache.flex.core.ApplicationBase in the SWC C:\FlexJSSDKs\0.9.0\frameworks\libs\Basic.swc could not be found -- Sent from: http://apache-flex-users.2333346.n4.nabble.com/
