[rules-users] Error with Helloworld Drools projet

[paco]

Hello everybody,

I want to create my first drools projet with eclipse and I've got this
following error.

org.drools.RuntimeDroolsException: Unable to load dialect
'org.drools.rule.builder.dialect.java.JavaDialectConfiguration:java'
	.............................
        ......................
Caused by: java.lang.RuntimeException: The Eclipse JDT Core jar is not in
the classpath
        ............................
        .................
	... 7 more

Please cant somebody tell me what's wrong with my program.
I've used an eclipse Eclipse Java EE IDE for Web Developers; and drools
4.0.7
Thanks


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