Index: lams_common/src/java/org/lamsfoundation/lams/util/svg/SVGGenerator.java
===================================================================
RCS file: /usr/local/cvsroot/lams_common/src/java/org/lamsfoundation/lams/util/svg/SVGGenerator.java,v
diff -u -r1.5 -r1.6
--- lams_common/src/java/org/lamsfoundation/lams/util/svg/SVGGenerator.java	6 Sep 2010 08:57:33 -0000	1.5
+++ lams_common/src/java/org/lamsfoundation/lams/util/svg/SVGGenerator.java	6 Sep 2010 10:26:51 -0000	1.6
@@ -159,8 +159,9 @@
 	    Point2D fromIntersection = SVGTrigonometryUtils.getRectangleAndLineSegmentIntersection(fromActivity, toActivity);
 	    Point2D toIntersection = SVGTrigonometryUtils.getRectangleAndLineSegmentIntersection(toActivity, fromActivity);            
             
-            //skip optional sequence's childs
-            if (fromActivity.isOptionalSequenceActivityChild()) {
+            //skip optional sequence's childs and lines between overlapped activities
+            if (fromActivity.isOptionalSequenceActivityChild() 
+        	    || (fromIntersection == null) || (toIntersection == null)) {
         	continue;
             }