Running MPJ Express on Eclipse

问题:

I am following these instructions to run MPJ Express on Eclipse. I defined the MPJ_HOME variable and added

-jar ${MPJ_HOME}/lib/starter.jar -np 4

to the VM arguments. When I run the program, the following exception is raised:

[MPJRun.java]:[MPJRun.java]:MPJ_HOME environment found..
java.lang.Exception: [MPJRun.java]:MPJ_HOME environment found..
    at runtime.starter.MPJRun.<init>(MPJRun.java:155)
    at runtime.starter.MPJRun.main(MPJRun.java:1238)

Why is this an exception? What can I do to fix it?