Hello,

In attachment there are a DRL file and java test case which causes the NPE mentionned below.

Thanks,
Regards

Exception in thread "main" java.lang.NullPointerException
at org.drools.rule.builder.PatternBuilder.buildRestriction(PatternBuilder.java:948)
at org.drools.rule.builder.PatternBuilder.buildRestriction(PatternBuilder.java:727)
at org.drools.rule.builder.PatternBuilder.createRestriction(PatternBuilder.java:504)
at org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:351)
at org.drools.rule.builder.PatternBuilder.buildConstraint(PatternBuilder.java:239)
at org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:196)
at org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:104)
at org.drools.rule.builder.GroupElementBuilder.build(GroupElementBuilder.java:69)
at org.drools.rule.builder.RuleBuilder.build(RuleBuilder.java:68)
at org.drools.compiler.PackageBuilder.addRule(PackageBuilder.java:1159)
at org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:649)
at org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:290)
at org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:488)
at org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:25)
at TestQuote.executeRule(TestQuote.java:37)
at TestQuote.main(TestQuote.java:19)