I am using drools 4.0.7 plug in with eclipse 3.4.1. I created a drools project 
with the example generated by the wizard. However I am getting this exception 
when trying to run the example. I see there are discussion around this topic 
but I still do not have clear understand what the final solution should be. 
Does anyone have final solution?

thanks

Xiandong

 org.drools.RuntimeDroolsException: Unable to load dialect 
'org.drools.rule.builder.dialect.java.JavaDialectConfiguration:java'
    at 
org.drools.compiler.PackageBuilderConfiguration.addDialect(PackageBuilderConfiguration.java:160)
    at 
org.drools.compiler.PackageBuilderConfiguration.buildDialectConfigurationMap(PackageBuilderConfiguration.java:146)
    at 
org.drools.compiler.PackageBuilderConfiguration.init(PackageBuilderConfiguration.java:121)
    at 
org.drools.compiler.PackageBuilderConfiguration.<init>(PackageBuilderConfiguration.java:98)
    at org.drools.compiler.PackageBuilder.<init>(PackageBuilder.java:124)
    at org.drools.compiler.PackageBuilder.<init>(PackageBuilder.java:86)
    at com.sample.DroolsTest.readRule(DroolsTest.java:50)
    at com.sample.DroolsTest.main(DroolsTest.java:21)
Caused by: java.lang.RuntimeException: The Eclipse JDT Core jar is not in the 
classpath
    at 
org.drools.rule.builder.dialect.java.JavaDialectConfiguration.setCompiler(JavaDialectConfiguration.java:91)
    at 
org.drools.rule.builder.dialect.java.JavaDialectConfiguration.init(JavaDialectConfiguration.java:52)
    at 
org.drools.compiler.PackageBuilderConfiguration.addDialect(PackageBuilderConfiguration.java:156)
    ... 7 more

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