This fails:-<br><br><i><b>Test<br></b></i><br>package com.guvnor.tests;<br><br>import org.drools.compiler.PackageBuilder;<br>import org.drools.compiler.PackageBuilderErrors;<br>import org.drools.io.ResourceFactory;<br>import org.drools.lang.descr.PackageDescr;<br>
<br>public class FragmentsTest {<br><br>    public static final void main(String[] args) {<br>        try {<br>            PackageBuilderErrors pbe;<br>            PackageBuilder pb = new PackageBuilder();<br>            pb.addPackage( new PackageDescr( &quot;p3&quot; ) );<br>
            pb.addPackageFromDrl( ResourceFactory.newClassPathResource( &quot;Fragment1.drl&quot; ) );<br>            pbe = pb.getErrors();<br>            System.out.println(&quot;Errors = &quot; + pbe.getErrors().length );<br>
            pb.addPackageFromDrl( ResourceFactory.newClassPathResource( &quot;Fragment2.drl&quot; ) );<br>            pbe = pb.getErrors();<br>            System.out.println(&quot;Errors = &quot; + pbe.getErrors().length );<br>
            pb.addPackageFromDrl( ResourceFactory.newClassPathResource( &quot;Fragment3.drl&quot; ) );<br>            pbe = pb.getErrors();<br>            System.out.println(&quot;Errors = &quot; + pbe.getErrors().length );<br>
            pb.getPackage();<br>        } catch ( Exception e ) {<br>            e.fillInStackTrace();<br>            e.printStackTrace();<br>        }<br>    }<br>}<br><br><i><b>Fragment1.drl<br></b></i><br>package com.guvnor.package3<br>
 <br>import com.guvnor.package1.Person<br>import java.math.BigDecimal<br><br><br><i><b>Fragment2.drl<br></b></i><br>package com.guvnor.package3<br><br><span style="color: rgb(255, 0, 0);">//import com.guvnor.package1.Person &lt;&lt;Fails unless I add this import</span><br style="color: rgb(255, 0, 0);">
<br>declare Person<br>end<br><br>declare Person2 extends Person<br>    name : String<br>    age : Integer<br>end<br><br><i><b>Fragment3.drl<br></b></i><br>package com.guvnor.package3<br><br>rule &quot;test&quot;<br>when<br>
    Person( salary == 10 )<br>then<br>    System.out.println(&quot;Hello Fred!&quot;);<br>end<br><br>Resolved with <a href="https://github.com/droolsjbpm/drools/commit/dc00433f3e3821a2c224ba8dc36f0235b07aef2f">https://github.com/droolsjbpm/drools/commit/dc00433f3e3821a2c224ba8dc36f0235b07aef2f</a><br>