[rules-users] ClassCastException: MVELDialectConfiguration cannot be cast to DialectConfiguration

[Bharadwaj N]

the key to the problem is this line in the error listing: "Caused by:
java.lang.RuntimeException: The Eclipse JDT Core jar is not in the
classpath"

This reference is to the library "core-3.4.2.v_883_R34x.jar" which is
installed by the Eclipse Drools plugin

If you add core-3.4.2.v_883_R34x.jar to your libraries then you won't get
the runtime exception.


On Tue, Mar 26, 2013 at 12:59 PM, Peach Wyss <peach_wyss at yahoo.com> wrote:

> Hy
>
> I get the following error:
> ...
>    Caused by: org.drools.RuntimeDroolsException: Unable to load dialect
> 'org.drools.rule.builder.dialect.mvel.MVELDialectConfiguration:mvel:org.drools.rule.builder.dialect.mvel.MVELDialectConfiguration'
>         at
> org.drools.compiler.PackageBuilderConfiguration.addDialect(PackageBuilderConfiguration.java:313)
>         ...
>         ... 42 more
>     Caused by: java.lang.ClassCastException:
> org.drools.rule.builder.dialect.mvel.MVELDialectConfiguration cannot be
> cast to org.drools.compiler.DialectConfiguration
>         at
> org.drools.compiler.PackageBuilderConfiguration.addDialect(PackageBuilderConfiguration.java:308)
>         ... 51 more
>
> I'm using drools in a maven project, pom.xml:
> ...
>     <dependency>
>         <groupId>org.drools</groupId>
>         <artifactId>drools-compiler</artifactId>
>         <version>5.5.0.Final</version>
>     </dependency>
>     <dependency>
>         <groupId>org.drools</groupId>
>         <artifactId>drools-core</artifactId>
>         <version>5.5.0.Final</version>
>     </dependency>
> ...
>
> What could cause this error?
>
> Thanks for your help.
>
> Kind regards,
> Peter
>
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