Using updated relast2uml, no duplicates occur anymore.

build.gradle

@@ -81,7 +81,7 @@ jar {
     from {
         configurations.runtimeClasspath.collect { return (it.isDirectory() ? it : zipTree(it)) }
     }
-    duplicatesStrategy = DuplicatesStrategy.EXCLUDE
+    duplicatesStrategy = DuplicatesStrategy.FAIL
 }
 
 def relastFiles = ['./src/main/jastadd/common/MotionGrammar.relast', './src/main/jastadd/World.relast', './src/main/jastadd/LoadUnload.relast']