> tell me what is the Alfresco Activiti BPM Suite classpath.?
If you're running Tomcat, that is either tomcat/lib or webapps/activiti-app/WEB-INF/lib (better)
> if i want to disable basic authentication for rest call then do i need to do that by modifing activiti-rest module in activiti source code and > add jar file to tomcat/webapp/activiti-app/WEB-INF/lib or in client side.
No, you'd have to change the SecurityConfiguration or create a new one that enhances the original one. Client side changes are not needed.
Why would you want to disable the basic auth for the REST api?