Drools error

[mikepoole]

I feel like I'm going backwards with Drools!!!

I have a process and associated simple drl file. When I create a new instance in Activiti Explorer, when I open my inbox (that contacts only the 1 new task), I get the following error:

java.lang.NoSucMethodError: org.drools.util.CompositeClassLoader.clone();

In my activiti-explorer/WEB-INF/lib directory, I have the jar files antlr-runtime-3.1.3, mvel2-2.1.0.drools4, knowledge-api-5.3.0.Final, drools-compiler-5.3.0.Final and drools-core-5.3.0.Final (the files are also in the activiti-rest/WEB-INF/lib for good measure)

As an aside, I also have in the same directory drools-api-5.1.1, antlr-2.7.7 and antl-3.3 - is there a versioning/priority conflict being caused by this perhaps?

What am I doing wrong?

Yours, on the edge of insanity!

Mike

[niktyagi88]

You are using wrong knowledge-api-5.3.0.Final.jar file because it not contain the method which is required by any class.So use correct jar file and the error will be solved.

[mikepoole]

Thanks for the reply.

Do you know which is the correct jar file to use?

[niktyagi88]

@mikepoole
Use the attached jar file

[valep]

i´m having the same problem, i use the jar you put and the problem still continues. Do you have any idea?