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This exception has no message.
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java.lang.ClassCastException: java.lang.String cannot be cast 
 to [B	at loadModel.Calamp3030And5000MessageType2$.(Calamp3030And5000MessageType2.scala:52)	at loadModel.Calamp3030And5000MessageType2$.(Calamp3030And5000MessageType2.scala)	at loadModel.ActivityManager.(ActivityManager.scala:15)	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)	at java.lang.reflect.Constructor.newInstance(Constructor.java:526)	at java.lang.Class.newInstance(Class.java:379)	at io.gatling.core.runner.Runner.run(Runner.scala:36)	at io.gatling.app.Gatling$$anonfun$runSimulationIfNecessary$1.apply(Gatling.scala:132)	at io.gatling.app.Gatling$$anonfun$runSimulationIfNecessary$1.apply(Gatling.scala:117)	at scala.Option.getOrElse(Option.scala:121)	at io.gatling.app.Gatling.runSimulationIfNecessary(Gatling.scala:117)	at io.gatling.app.Gatling.start(Gatling.scala:73)	at io.gatling.app.Gatling$.fromArgs(Gatling.scala:59)	at io.gatling.app.Gatling$.main(Gatling.scala:44)	at io.gatling.app.Gatling.main(Gatling.scala)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:606)	at io.gatling.mojo.MainWithArgsInFile.runMain(MainWithArgsInFile.java:50)	at io.gatling.mojo.MainWithArgsInFile.main(MainWithArgsInFile.java:33)