Hello,<br>First sorry for my bad english,<br><br>I set all the class .java is in package hero.client.test<br>and the file .drl is in folser Drl<br>the call of file .drl <br><span style="color: rgb(0, 127, 64);">InputStream in = DroolsTest.class.getResourceAsStream("Drl/Sample.drl");</span><br><br>but the problem is they didn't find the file .drl <br>always an exception is affiched<br><br><span style="color: rgb(255, 0, 0);">Exception in thread "main" java.lang.NullPointerException</span><br style="color: rgb(255, 0, 0);"><span style="color: rgb(255, 0, 0);"> at java.io.Reader.<init>(Reader.java:61)</span><br style="color: rgb(255, 0, 0);"><span style="color: rgb(255, 0, 0);"> at java.io.InputStreamReader.<init>(InputStreamReader.java:55)</span><br style="color: rgb(255, 0, 0);"><span style="color: rgb(255, 0, 0);"> at
org.drools.jsr94.rules.admin.LocalRuleExecutionSetProviderImpl.createRuleExecutionSet(Unknown Source)</span><br style="color: rgb(255, 0, 0);"><span style="color: rgb(255, 0, 0);"> at hero.client.test.DroolsTest.main(DroolsTest.java:34)</span><br>Please I need your help<br>Best regards<br>Ismail<br><p> 
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