[rules-users] Help

hello to all, I need help when running a rule of example I come up against the following error: * org.drools.RuntimeDroolsException*: Unable to load dialect ' org.drools.rule.builder.dialect.java.JavaDialectConfiguration:*java'* *at* org.drools.compiler.PackageBuilderConfiguration.*buildDialectRegistry*( *PackageBuilderConfiguration.java:138*) at org.drools.compiler.PackageBuilderConfiguration.init(* PackageBuilderConfiguration.java:114*) at org.drools.compiler.PackageBuilderConfiguration.<init>(* PackageBuilderConfiguration.java:87*) at org.drools.compiler.PackageBuilder.<init>(*PackageBuilder.java:122*) at org.drools.compiler.PackageBuilder.<init>(*PackageBuilder.java:88*) 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:98*) at org.drools.rule.builder.dialect.java.JavaDialectConfiguration.init(* JavaDialectConfiguration.java:56*) at org.drools.compiler.PackageBuilderConfiguration.buildDialectRegistry(* PackageBuilderConfiguration.java:134*) ... 6 more *I will be very grateful if they help me*