--- apisupport.project/src/org/netbeans/modules/apisupport/project/queries/SourceForBinaryImpl.java	2008-04-21 18:42:38.000000000 +0200
+++ apisupport.project/src/org/netbeans/modules/apisupport/project/queries/SourceForBinaryImpl.java	2008-05-15 17:28:30.000097000 +0200
@@ -46,6 +46,8 @@
 import java.net.URL;
 import java.util.Map;
 import java.util.HashMap;
+import java.util.logging.Level;
+import java.util.logging.Logger;
 import javax.swing.event.ChangeListener;
 import org.netbeans.api.java.queries.SourceForBinaryQuery;
 import org.netbeans.modules.apisupport.project.NbModuleProject;
@@ -119,7 +121,10 @@
                         }
                         File loc = project.getHelper().resolveFile(text);
                         URL u = FileUtil.urlForArchiveOrDir(loc);
-                        if (u.equals(binaryRoot)) {
+                        if (u == null) {
+                            Logger.getLogger(SourceForBinaryImpl.class.getName()).log(Level.WARNING, "null URL returned for file "+loc);
+                        }
+                        else if (u.equals(binaryRoot)) {
                             res = new Result(entry.getKey());
                             break ECUS;
                         }