Eclipse Ganymede: Saving the following drl file: (based on article http://www.onjava.com/lpt/a/6093) package BusinessRules #list any import classes here. import com.drools.test.StockOffer; #declare any global variables here function void printStock( StockOffer stock ) { #function content (can have multiple functions) System.out.println("Name: " + stock.getStockName() + " Price: " + stock.getStockPrice() + " BUY: " + stock.getRecommendPurchase()); } rule "Stock Price Low Enough" when #conditions offer : StockOffer(recommendPurchase == null, stockPrice < 100) then #actions offer.setRecommendPurchase( StockOffer.YES ); printStock( offer ); end Results in: Description Resource Path Location Type Missing package name for rule package. BusinessRules.drl DroolsStockSample/src/rules Unknown Drools Error Yet the test application runs fine! /steve Stephen R. Alpert, PhD GE Healthcare Clinical Business Solutions Principal Technical Architect T 617 519 2216 F 617 519 2625 E steve.alpert(a)ge.com <blocked::mailto:steve.alpert@ge.com> www.gehealthcare.com