Another change that occurred in parallel with the upgrade was responsible for the upgrade. MY apologies for the false alarm. <br><br>I am now seeing a problem with &quot;Unable to load dialect  ... JavaDialectConfiguration&quot; - it appears to be looking for the Eclipse JDT jar file. However, I have never required that before. I use the Eclipse plugin but have not needed the JDT jar in the deployed app - doing fine with drools-compiler. I can start a new thread for this issue if it&#39;s going to take more than one reply to address this.<br>
Here&#39;s the drools dependencies in my classpath:<br><div style="margin-left: 40px;">antlr-runtime-3.1.1.jar<br>drools-api-5.0.1.jar<br>drools-compiler-5.0.1.jar<br>drools-core-5.0.1.jar<br>joda-time-1.6.jar<br>mvel2-2.0.10.jar<br>
</div><br>Here&#39;s the error output:<br>Exception in thread &quot;AWT-EventQueue-0&quot; org.drools.RuntimeDroolsException: Unable to load dialect &#39;org.drools.rule.builder.dialect.java.JavaDialectConfiguration:java:org.drools.rule.builder.dialect.java.JavaDialectConfiguration&#39;<br>
    at org.drools.compiler.PackageBuilderConfiguration.addDialect(PackageBuilderConfiguration.java:274)<br>    at org.drools.compiler.PackageBuilderConfiguration.buildDialectConfigurationMap(PackageBuilderConfiguration.java:259)<br>
    at org.drools.compiler.PackageBuilderConfiguration.init(PackageBuilderConfiguration.java:176)<br>    at org.drools.compiler.PackageBuilderConfiguration.&lt;init&gt;(PackageBuilderConfiguration.java:153)<br>    at org.drools.compiler.PackageBuilder.&lt;init&gt;(PackageBuilder.java:242)<br>
    at org.drools.compiler.PackageBuilder.&lt;init&gt;(PackageBuilder.java:142)<br>    at com.cbfp.findata.Rules.generateRuleBase(Rules.java:165)<br>    at com.cbfp.findata.Rules.addPackage(Rules.java:208)<br>    at com.cbfp.findata.Rules.createRules(Rules.java:64)<br>
    ...<br>Caused by: java.lang.RuntimeException: The Eclipse JDT Core jar is not in the classpath<br>    at org.drools.rule.builder.dialect.java.JavaDialectConfiguration.setCompiler(JavaDialectConfiguration.java:94)<br>    at org.drools.rule.builder.dialect.java.JavaDialectConfiguration.init(JavaDialectConfiguration.java:55)<br>
    at org.drools.compiler.PackageBuilderConfiguration.addDialect(PackageBuilderConfiguration.java:270)<br>    ... <br>