I have a custom accumulate function written in java which I use in my rules. To make this work in eclipse, I had to define this function in drools.packagebuilder.conf file and put that in the root of the project. Drools.packagebuilder.conf file content: drools.accumulate.function.groupCount = com.company.analysis.accumulators.GroupByAccumulateFunction When I try the same in guvnor, I am not sure where to define this custom function (similar to drools.packagebuilder.conf file) so that my rules will get built into a package. Currently when I build the package from guvnor, I get the following error: Unable to build expression for 'accumulate' : No accumulator function found for identifier: groupCount This is because the drl file doesn't know how to interpret the "groupCount" function as its not defined anywhere. I looked up the documentation and the mailing list and couldn't find any solution. I also tried importing the whole drools.packagebuilder.conf file into guvnor and that doesn't seem to work as well. Thanks for your help, Srini _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users