Fixing Null pointer exceptions

- on computeDimension
- when exporting to XLS

src/plugins/adufour/activecontours/ActiveContours.java

@@ -1514,7 +1514,7 @@ public class ActiveContours extends EzPlug implements EzStoppable, Block
             }
             catch (Exception e)
             {
-                throw new RuntimeException(e.getCause());
+                throw new RuntimeException(e);
             }
 
             if (coupling_flag.getValue())
@@ -1591,7 +1591,7 @@ public class ActiveContours extends EzPlug implements EzStoppable, Block
                 }
                 catch (ExecutionException e)
                 {
-                    e.getCause().printStackTrace();
+                    e.printStackTrace();
                     throw new RuntimeException(e);
                 }
                 catch (RuntimeException e)
@@ -1640,7 +1640,7 @@ public class ActiveContours extends EzPlug implements EzStoppable, Block
             }
             catch (Exception e)
             {
-                e.getCause().printStackTrace();
+                e.printStackTrace();
                 throw new RuntimeException(e);
             }
         }
@@ -1675,7 +1675,7 @@ public class ActiveContours extends EzPlug implements EzStoppable, Block
                 }
                 catch (Exception e)
                 {
-                    e.getCause().printStackTrace();
+                    e.printStackTrace();
                     throw new RuntimeException(e);
                 }
             }
@@ -1726,8 +1726,6 @@ public class ActiveContours extends EzPlug implements EzStoppable, Block
         if (isHeadLess())
             System.out.println("=> Storing result...");
 
-        boolean noResultsOnCurrentFrame = true;
-
         List<TrackSegment> segments = trackGroup.getValue().getTrackSegmentList();
         // Append the current list to the existing one
         List<ROI> rois = new ArrayList<ROI>(Arrays.asList(roiOutput.getValue()));
@@ -1740,8 +1738,6 @@ public class ActiveContours extends EzPlug implements EzStoppable, Block
             if (contour == null)
                 continue;
 
-            noResultsOnCurrentFrame = false;
-
             // Update volume information
             if (!volumes.containsKey(segment))
                 volumes.put(segment, contour.getDimension(2));