diff -u -r1.5 -r1.6
--- MergeUtil.java	26 Apr 2006 20:51:48 -0000	1.5
+++ MergeUtil.java	28 Apr 2006 18:48:15 -0000	1.6
@@ -10,16 +10,13 @@

 import hep.lcio.implementation.event.ISimCalorimeterHit;
 import hep.lcio.implementation.event.ISimTrackerHit;
 import hep.lcio.implementation.io.LCFactory;

-import hep.lcio.implementation.sio.SIOEvent;

 import hep.lcio.io.LCReader;
 import hep.lcio.io.LCWriter;
 
 import java.io.File;
 import java.io.IOException;

-import java.util.HashMap;

 import java.util.Iterator;
 import java.util.List;

-import java.util.Map;

 
 /**
  * Utility methods for merging together LCIO 

@@ -27,7 +24,7 @@

  * application of a delta time.
  * 
  * @author jeremym

- * @version $Id: MergeUtil.java,v 1.5 2006/04/26 20:51:48 jeremy Exp $

+ * @version $Id: MergeUtil.java,v 1.6 2006/04/28 18:48:15 jeremy Exp $

  */
 abstract public class MergeUtil
 {

@@ -156,7 +153,7 @@

 	public static int mergeEvents(LCEvent targetEvent, LCReader overlayEvents, int ntoread, boolean setEventHeader, float startt, float dt) throws IOException
 	{
 		// Read the next event from the reader.

-		LCEvent nextEvent = overlayEvents.readNextEvent();

+		LCEvent nextEvent = overlayEvents.readNextEvent(LCIO.UPDATE);

 
 		// Return 0 if reader is exhausted.
 		if (nextEvent == null)

@@ -194,7 +191,7 @@

 				break;
 
 			// Get next event to merge in. (could be null)

-			nextEvent = overlayEvents.readNextEvent();

+			nextEvent = overlayEvents.readNextEvent(LCIO.UPDATE);

 
 			// Increment the time for next event.
 			time += dt;

@@ -218,12 +215,6 @@

 			return;
 		}
 

-		if (overlayEvent instanceof SIOEvent)
-		{
-			// Turn off readonly mode on overlay event.
-			((SIOEvent) overlayEvent).setReadOnly(false);
-		}
-

 		// Get names of collections already existing in target.
 		String[] tcolls = targetEvent.getCollectionNames();