rJava / JRI错误 - java.lang.NoClassDefFoundError：org / rosuda / JRI / Rengine

Question

有谁可以告诉我更多有关此错误的信息？

Exception in thread "main" java.lang.NoClassDefFoundError: org/rosuda/JRI/Rengine
    at DataMining.RunMinerBack.checkRLibVersion(RunMinerBack.java:643)
    at DataMining.RunMinerBack.init(RunMinerBack.java:831)
    at DataMining.RunMinerBack.<init>(RunMinerBack.java:126)
    at DataMining.ListMergeMembers.init(ListMergeMembers.java:1453)
    at DataMining.ListMergeMembers.<init>(ListMergeMembers.java:95)
    at DataMining.ListMergeMembers.main(ListMergeMembers.java:1585)
Caused by: java.lang.ClassNotFoundException: org.rosuda.JRI.Rengine
    at java.net.URLClassLoader$1.run(URLClassLoader.java:372)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:360)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    ... 6 more

我安装了rJava，我的CLASSPATH中有JRI.jar。我也检查过，我在JRI.jar中有Rengine.class，在同一条路径 - org / rosuda / JRI / Rengine.class。我不确定在哪里/哪里检查，所以任何建议都将不胜感激。