Error when run MPJ in Netbeans

Question

When I run MPJ program in Netbeans,here is exception:

[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)

How to solve it?