[jboss-user] [Beginners Corner] - error while running Drools

[hishamlina]

I found this error while running the sample of Drools file 
what is the problem actually.
many thanks

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.(PackageBuilderConfiguration.java:98)
	at org.drools.compiler.PackageBuilder.(PackageBuilder.java:124)
	at org.drools.compiler.PackageBuilder.(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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