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This exception has no message.
java.lang.NullPointerException: 	at java.io.File.(Unknown Source)	at com.sencha.util.FileUtil.readFile(FileUtil.java:158)	at com.sencha.tools.compiler.jsb.projects.JsbBuilder.processBuild(JsbBuilder.java:29)	at com.sencha.command.build.JsbCommand.execute(JsbCommand.java:15)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)	at java.lang.reflect.Method.invoke(Unknown Source)	at com.sencha.util.MethodInvoker$Arguments.invoke(MethodInvoker.java:175)	at com.sencha.cli.Command.dispatch(Command.java:43)	at com.sencha.cli.Commands.dispatch(Commands.java:64)	at com.sencha.command.Sencha.dispatch(Sencha.java:73)	at com.sencha.command.Sencha.main(Sencha.java:141)