Hi, Can some one help in resolving the below issue or if there is any work around for this? There is a strange behaviour in terms of loading the facts using dialect java and mvel. Our requirement is that we should support dynamic changes to fact objects in the application without a restart. So, to achieve that I am using jar classloader to load the fact objects into memory. So before constructing RuleBase I am switching the current class loader context to jar classloader. By doing this, all the imported facts getting resolved if I use mvel dialect where as if I use java dialect it's not able to resolve the fact. Can someone help on how to resolve this issue. I can't use mvel dialect as it's behaving strangely in case of accumulate. So I need to use java dialect only. Please let me know why java dialect is considering the facts only from classpath. It's not loading from current classloader's context Below is the code to switch classloader context Thread.currentThread().setContextClassLoader( jarClassLoader); InputStream is = //reads from jar content RuleBase ruleBase = RuleBaseLoader.getInstance().loadFromReader( new InputStreamReader(is)); StatelessSession statelessSession = ruleBase.newStatelessSession(); statelessSession.executeWithResults(facts); Thanks Santhosh