Re: [rules-users] Migrate from 5.2.0 to 5.5.0

Hello, I am trying to migrate from drools version 5.2.0 to 5.5.0 and after change libs i get a error: java.lang.NoClassDefFoundError: Could not initialize class org.drools.rule.builder.DefaultConstraintBuilderFactory at org.drools.rule.builder.DroolsCompilerComponentFactory. <init> (DroolsCompilerComponentFactory.java:11) at org.drools.compiler.PackageBuilderConfiguration.init(PackageBuilderConfiguration.java:210) at org.drools.compiler.PackageBuilderConfiguration. <init> (PackageBuilderConfiguration.java:165) at org.drools.builder.impl.KnowledgeBuilderFactoryServiceImpl.newKnowledgeBuilderConfiguration(KnowledgeBuilderFactoryServiceImpl.java:26) at org.drools.builder.KnowledgeBuilderFactory.newKnowledgeBuilderConfiguration(KnowledgeBuilderFactory.java:85) Could you please help me with this problem?