Dealing with VariableElimination.probability

[pouriadodido]

I'm a beginer in figaro and my IDE is Intellij. when I run a simple code without println(VariableElimination.probability()), I dont have any error. but when I use it .......
this is my program for testing:

import com.cra.figaro.language._
import com.cra.figaro.algorithm.factored.VariableElimination

object testFigaro {
def main(args: Array[String]){
val sunnyToday = Flip(0.2)
println(VariableElimination.probability(sunnyToday, true))
}
}

And this is error:

Exception in thread "main" java.lang.NoClassDefFoundError: scala/reflect/runtime/package$
at com.cra.figaro.algorithm.factored.ProbQueryVariableElimination.makeResultFactor(VariableElimination.scala:238)
at com.cra.figaro.algorithm.factored.ProbQueryVariableElimination.finish(VariableElimination.scala:242)
at com.cra.figaro.algorithm.factored.VariableElimination.$anonfun$doElimination$5(VariableElimination.scala:175)
at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:12)
at com.cra.figaro.algorithm.factored.VariableElimination.optionallyShowTiming(VariableElimination.scala:63)
at com.cra.figaro.algorithm.factored.VariableElimination.doElimination(VariableElimination.scala:175)
at com.cra.figaro.algorithm.factored.VariableElimination.doElimination$(VariableElimination.scala:163)
at com.cra.figaro.algorithm.factored.ProbQueryVariableElimination.doElimination(VariableElimination.scala:213)
at com.cra.figaro.algorithm.factored.VariableElimination.ve(VariableElimination.scala:160)
at com.cra.figaro.algorithm.factored.VariableElimination.ve$(VariableElimination.scala:155)
at com.cra.figaro.algorithm.factored.ProbQueryVariableElimination.ve(VariableElimination.scala:213)
at com.cra.figaro.algorithm.factored.VariableElimination.run(VariableElimination.scala:186)
at com.cra.figaro.algorithm.factored.VariableElimination.run$(VariableElimination.scala:186)
at com.cra.figaro.algorithm.factored.ProbQueryVariableElimination.run(VariableElimination.scala:213)
at com.cra.figaro.algorithm.OneTime.doStart(OneTime.scala:28)
at com.cra.figaro.algorithm.OneTime.doStart$(OneTime.scala:26)
at com.cra.figaro.algorithm.factored.ProbQueryVariableElimination.doStart(VariableElimination.scala:213)
at com.cra.figaro.algorithm.Algorithm.start(Algorithm.scala:83)
at com.cra.figaro.algorithm.Algorithm.start$(Algorithm.scala:80)
at com.cra.figaro.algorithm.factored.ProbQueryVariableElimination.start(VariableElimination.scala:213)
at com.cra.figaro.algorithm.factored.VariableElimination$.probability(VariableElimination.scala:359)
at com.cra.figaro.algorithm.factored.VariableElimination$.probability(VariableElimination.scala:369)
at testFigaro$.main(testFigaro.scala:7)
at testFigaro.main(testFigaro.scala)
Caused by: java.lang.ClassNotFoundException: scala.reflect.runtime.package$
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 24 more

Please help me
What should I do to deal with?

[mreposa]

Do you have Scala installed and on your execution path?

[pouriadodido]

I'm not sure.

[mreposa]

That's OK.... I can help you figure that out. Are you using Windows for your operating system?

[pouriadodido]

Thanks. yes my OS is Win.

[mreposa]

My apologies for the delay..... to verify Scala is installed, open a Windows command prompt and type:

scala -version

You should see output similar to this (depending on your Scala version):

Scala code runner version 2.12.4 -- Copyright 2002-2017, LAMP/EPFL and Lightbend, Inc.

If you don't get this response, you should go to the Scala Web site and download the version of Scala for Windows that matches the version of Figaro you're working with (for instance, Figaro 5.0 requires Scala 2.12.2 or higher).

[verrchu]

got the same issue on macOS with Scala 12.2.6