diff --git a/source/org/thdl/tib/scanner/CachedSyllableListTree.java b/source/org/thdl/tib/scanner/CachedSyllableListTree.java
index bf28a95..42f5fbe 100644
--- a/source/org/thdl/tib/scanner/CachedSyllableListTree.java
+++ b/source/org/thdl/tib/scanner/CachedSyllableListTree.java
@@ -35,15 +35,20 @@ import org.thdl.util.*;
 public class CachedSyllableListTree implements SyllableListTree
 {
 	SyllableListTree syllables[];
-
+	
 	public CachedSyllableListTree(String archivo) throws Exception
+	{
+	    this (archivo, true);
+	}
+
+	public CachedSyllableListTree(String archivo, boolean backwardCompatible) throws Exception
 	{
 		String sil;
 		long pos, defSources[];
 		DictionarySource sourceDef;
 		int i;
 		
-		FileSyllableListTree.openFiles(archivo);
+		FileSyllableListTree.openFiles(archivo, backwardCompatible);
 				
 		SimplifiedLinkedList syllables = new SimplifiedLinkedList();		
 		do
diff --git a/source/org/thdl/tib/scanner/FileSyllableListTree.java b/source/org/thdl/tib/scanner/FileSyllableListTree.java
index 98013ef..9ccd510 100644
--- a/source/org/thdl/tib/scanner/FileSyllableListTree.java
+++ b/source/org/thdl/tib/scanner/FileSyllableListTree.java
@@ -82,8 +82,26 @@ public class FileSyllableListTree implements SyllableListTree
 	{
 	    return this.defSourcesWanted;
 	}
-
+	
 	public static void openFiles(String archivo) throws Exception
+	{
+	    openFiles(archivo, true);
+	}
+	
+	public static void closeFiles()
+	{
+	    try
+	    {
+	        wordRaf.close();
+	        defRaf.close();
+	    }
+	    catch (Exception e)
+	    {
+	        e.printStackTrace();
+	    }
+	}
+
+	public static void openFiles(String archivo, boolean backwardCompatible) throws Exception
 	{
 	    long fileSize;
 	    int pos;
@@ -109,17 +127,34 @@ public class FileSyllableListTree implements SyllableListTree
 		    // Updates the dictionary for backward compatibility.		    
 		    try
 		    {
-    		    wordRaf.close();
-	    	    wordRaf = new RandomAccessFile(archivo + ".wrd", "rw");
-    		    wordRaf.seek(fileSize);    	    
-		        wordRaf.writeShort(-1);
-		        wordRaf.writeByte(-1);
-		        
-		        // Because it didn't have a version number, must be version 2.
-		        versionNumber = 2;
-		        wordRaf.writeByte(versionNumber);
-		        wordRaf.close();
-		        wordRaf = new RandomAccessFile(archivo + ".wrd", "r");
+		        if (backwardCompatible)
+		        {
+    		        wordRaf.close();
+	    	        wordRaf = new RandomAccessFile(archivo + ".wrd", "rw");
+    		        wordRaf.seek(fileSize);    	    
+		            wordRaf.writeShort(-1);
+		            wordRaf.writeByte(-1);
+    		        
+		            // Because it didn't have a version number, must be version 2.
+		            versionNumber = 2;
+		            wordRaf.writeByte(versionNumber);
+		            wordRaf.close();
+		            wordRaf = new RandomAccessFile(archivo + ".wrd", "r");
+		        }
+		        else
+		        {
+		            // something is wrong
+		            ScannerLogger sl = new ScannerLogger();
+		            sl.writeLog("Crash\tFileSyllableListTree\t" + "size: " + fileSize + "; bytes: " + Integer.toHexString(pos));
+		            
+		            // try to open again, but not corrupting the file
+		            wordRaf = new RandomAccessFile(archivo + ".wrd", "r");
+
+		            fileSize = wordRaf.length();
+		            wordRaf.seek(fileSize-8L);
+		            pos = wordRaf.readInt();
+            		versionNumber = 3;
+		        }
 		    }
 		    catch (Exception e)
 		    {
diff --git a/source/org/thdl/tib/scanner/LocalTibetanScanner.java b/source/org/thdl/tib/scanner/LocalTibetanScanner.java
index 7d48030..bb5c1b8 100644
--- a/source/org/thdl/tib/scanner/LocalTibetanScanner.java
+++ b/source/org/thdl/tib/scanner/LocalTibetanScanner.java
@@ -47,15 +47,19 @@ public class LocalTibetanScanner extends TibetanScanner
 	{
 		return raiz.getDictionarySourcesWanted();
 	}
-
-
+	
 	public LocalTibetanScanner(String arch) throws Exception
+	{
+	    this (arch, true);
+	}
+
+	public LocalTibetanScanner(String arch, boolean backwardCompatible) throws Exception
 	{
 	    super();
 		archivo = arch;
 		// raiz = new MemorySyllableListTree(archivo);
 		// raiz = new FileSyllableListTree(archivo);
-		raiz = new CachedSyllableListTree(archivo);
+		raiz = new CachedSyllableListTree(archivo, backwardCompatible);
 		floatingSil = new Vector();
 		resetAll();
 	}
@@ -409,4 +413,9 @@ outAHere:
 			return null;
 		}
 	}
+    public void destroy()
+    {
+        FileSyllableListTree.closeFiles();
+    }
+    
 }
\ No newline at end of file
diff --git a/source/org/thdl/tib/scanner/OnLineScannerFilter.java b/source/org/thdl/tib/scanner/OnLineScannerFilter.java
index 48df7ba..d2ffe37 100644
--- a/source/org/thdl/tib/scanner/OnLineScannerFilter.java
+++ b/source/org/thdl/tib/scanner/OnLineScannerFilter.java
@@ -48,16 +48,29 @@ public class OnLineScannerFilter extends HttpServlet
     ResourceBundle rb;
 	private TibetanScanner scanner;
 	private String dictionaries[];
+	private ScannerLogger sl;
 	
-	public OnLineScannerFilter() throws Exception
+	public OnLineScannerFilter() //throws Exception
 	{
 		rb = ResourceBundle.getBundle(propertyFile);
-		scanner = new LocalTibetanScanner(rb.getString(dictNameProperty));
+	    sl = new ScannerLogger();
+	    
+		try
+		{
+		    scanner = new LocalTibetanScanner(rb.getString(dictNameProperty), false);
+		}
+		catch (Exception e)
+		{
+		    sl.writeLog("Crash\tOnLineScannerFilter");
+		    sl.writeException(e);
+		}
+		
 		dictionaries = scanner.getDictionaryDescriptions();
+		sl.writeLog("Creation\tOnLineScannerFilter");
 	}
 
     synchronized public void doGet(HttpServletRequest request,
-                      HttpServletResponse response) throws IOException, ServletException
+                      HttpServletResponse response) //throws IOException, ServletException
     {
 		String answer, parrafo = null, checkboxName;
         
@@ -66,7 +79,19 @@ public class OnLineScannerFilter extends HttpServlet
         ThdlOptions.setUserPreference("thdl.rely.on.system.tm.fonts", true);
         
         response.setContentType("text/html");
-        PrintWriter out = response.getWriter();
+        PrintWriter out;
+        sl.setUserIP(request.getRemoteAddr());
+        
+        try
+        {
+            out = response.getWriter();
+        }
+		catch (Exception e)
+		{
+		    sl.writeLog("Crash\tOnLineScannerFilter");
+		    sl.writeException(e);
+		    return;
+		}
 				
 		BitDictionarySource ds=null;
 		boolean checkedDicts[], allUnchecked, wantsTibetan, useTHDLBanner = (request.getParameter("thdlBanner")!=null);
@@ -260,8 +285,12 @@ public class OnLineScannerFilter extends HttpServlet
         out.println("</form>");
 		
         if (parrafo != null)
+        {
+            sl.writeLog("Translation\tOnLineScannerFilter");
         	if (ds!=null && !ds.isEmpty())
         		desglosar(parrafo, out, wantsTibetan);
+        }
+        else sl.writeLog("Invocation\tOnLineScannerFilter");
 		
 		out.println(TibetanScanner.copyrightHTML);
 		if (useTHDLBanner) out.println("</div><!--END main-->");
@@ -271,7 +300,7 @@ public class OnLineScannerFilter extends HttpServlet
 	
     public void doPost(HttpServletRequest request,
                       HttpServletResponse response)
-        throws IOException, ServletException
+        //throws IOException, ServletException
     {
         doGet(request, response);
     }
@@ -408,4 +437,13 @@ public class OnLineScannerFilter extends HttpServlet
 		}
 		pw.println("</table>");
 	}
+	
+	public void destroy()
+	{
+	    super.destroy();
+	    sl.setUserIP(null);
+	    sl.writeLog("Shutdown\tOnLineScannerFilter");
+	    scanner.destroy();
+	}
+	
 }
diff --git a/source/org/thdl/tib/scanner/PocketWindowScannerFilter.java b/source/org/thdl/tib/scanner/PocketWindowScannerFilter.java
index 8041a39..a53f943 100644
--- a/source/org/thdl/tib/scanner/PocketWindowScannerFilter.java
+++ b/source/org/thdl/tib/scanner/PocketWindowScannerFilter.java
@@ -22,7 +22,6 @@ import java.awt.*;
 import java.util.*;
 import java.io.*;
 import java.awt.event.*;
-import java.applet.Applet;
 import java.awt.*;
 import java.awt.datatransfer.*;
 import org.thdl.util.*;
diff --git a/source/org/thdl/tib/scanner/RemoteScannerFilter.java b/source/org/thdl/tib/scanner/RemoteScannerFilter.java
index b0116e9..9a0c105 100644
--- a/source/org/thdl/tib/scanner/RemoteScannerFilter.java
+++ b/source/org/thdl/tib/scanner/RemoteScannerFilter.java
@@ -36,30 +36,47 @@ public class RemoteScannerFilter extends GenericServlet
 {
 	private TibetanScanner scanner;
 	private BitDictionarySource ds;
+	private ScannerLogger sl;
 	
-	public RemoteScannerFilter() throws Exception
+	public RemoteScannerFilter()
 	{
 		ResourceBundle rb = ResourceBundle.getBundle("dictionary");
-		scanner = new LocalTibetanScanner(rb.getString("onlinescannerfilter.dict-file-name"));
-		ds = scanner.getDictionarySource();
+		sl = new ScannerLogger();
 
-    		
-	    String fileName = rb.getString("remotescannerfilter.log-file-name");
-	    Calendar rightNow = Calendar.getInstance();
-	    	
-	    PrintStream pw = new PrintStream(new FileOutputStream(fileName, true));
-	    pw.println("Testing: " + rightNow.toString());
-	    pw.flush();
-	    pw.close();
+	    try
+	    {
+		    scanner = new LocalTibetanScanner(rb.getString("onlinescannerfilter.dict-file-name"),false);
+		}
+		catch (Exception e)
+		{
+		    sl.writeLog("Crash\tRemoteScannerFilter");
+		    sl.writeException(e);
+		}		
+		ds = scanner.getDictionarySource();
+		sl.writeLog("Creation\tRemoteScannerFilter");
 	}
 
-  	public void service(ServletRequest req, ServletResponse res) throws ServletException, IOException
+  	public void service(ServletRequest req, ServletResponse res) //throws ServletException, IOException
   	{
   		BufferedReader br;
   		res.setContentType ("text/plain");
+  		sl.setUserIP(req.getRemoteAddr());
+  		
   		Token token[] = null;  		
   		Word word = null;
-	    PrintWriter out = res.getWriter();
+  		PrintWriter out;
+  		
+  		try
+  		{
+	        out = res.getWriter();
+	    }
+		catch (Exception e)
+		{
+		    sl.writeLog("Crash\tRemoteScannerFilter");
+		    sl.writeException(e);
+		    return;
+		}		
+	    
 	    int i;
   		String linea, dicts = req.getParameter("dicts"), dicDescrip[];
   		
@@ -67,6 +84,7 @@ public class RemoteScannerFilter extends GenericServlet
   		{
   			if (dicts.equals("names"))
   			{
+  			    sl.writeLog("Invocation\tRemoteScannerFilter");
 				dicDescrip = scanner.getDictionaryDescriptions();
 				if (dicDescrip==null)
 				{
@@ -86,11 +104,24 @@ public class RemoteScannerFilter extends GenericServlet
   				ds.setDicts(Integer.parseInt(dicts));
   			}
   		}
-  		br = new BufferedReader(new InputStreamReader(req.getInputStream()));
+  		
+  		try
+  		{
+  		    br = new BufferedReader(new InputStreamReader(req.getInputStream()));
+  		}
+		catch (Exception e)
+		{
+		    sl.writeLog("Crash\tRemoteScannerFilter");
+		    sl.writeException(e);
+		    return;
+		}		
+  		
   		
   		/*  FIXME: sometimes getDef returns raises a NullPointerException.
   		    In the meantime, I'll just keep it from crashing
   		*/
+  		sl.writeLog("Translation\tRemoteScannerFilter");
+  		
   		try
   		{
   		    while((linea = br.readLine())!= null)
@@ -112,29 +143,19 @@ public class RemoteScannerFilter extends GenericServlet
 		}
 		catch (Exception e)
 		{
-    		ResourceBundle rb = ResourceBundle.getBundle("dictionary");
-	    	String fileName = rb.getString("remotescannerfilter.log-file-name");
-	    	Calendar rightNow = Calendar.getInstance();
-	    	
-	    	PrintStream pw = new PrintStream(new FileOutputStream(fileName, true));
-	    	pw.println("Translation tool crashed on: " + rightNow.toString());
-	    	e.printStackTrace(pw);
-	    	pw.println();
-	    	pw.println("Word that crashed: " + word.getWylie());
-	    	pw.println();
-	    	pw.println("All words:");
-		    for (i=0; i<token.length; i++)
-		    {
-			    if (!(token[i] instanceof Word)) continue;
-			    word = (Word) token[i];
-			    out.println(word.getWylie());
-			}
-			pw.println();
-			pw.flush();
-			pw.close();
+		    sl.writeLog("Crash\tRemoteScannerFilter\t" + word.getWylie());
+		    sl.writeException(e);
 		}
 
 		scanner.clearTokens();
 	    out.close();
 	}
+	
+	public void destroy()
+	{
+	    super.destroy();
+	    sl.setUserIP(null);
+	    sl.writeLog("Shutdown\tRemoteScannerFilter");
+	    scanner.destroy();
+	}
 }
\ No newline at end of file
diff --git a/source/org/thdl/tib/scanner/RemoteTibetanScanner.java b/source/org/thdl/tib/scanner/RemoteTibetanScanner.java
index 7daf9dc..40c2498 100644
--- a/source/org/thdl/tib/scanner/RemoteTibetanScanner.java
+++ b/source/org/thdl/tib/scanner/RemoteTibetanScanner.java
@@ -137,4 +137,7 @@ public class RemoteTibetanScanner extends TibetanScanner
 			return null;
 		}
 	}
+    public void destroy()
+    {
+    }
 }
diff --git a/source/org/thdl/tib/scanner/ScannerLogger.java b/source/org/thdl/tib/scanner/ScannerLogger.java
new file mode 100644
index 0000000..18af076
--- /dev/null
+++ b/source/org/thdl/tib/scanner/ScannerLogger.java
@@ -0,0 +1,83 @@
+/*
+The contents of this file are subject to the AMP Open Community License
+Version 1.0 (the "License"); you may not use this file except in compliance
+with the License. You may obtain a copy of the License on the AMP web site 
+(http://www.tibet.iteso.mx/Guatemala/).
+
+Software distributed under the License is distributed on an "AS IS" basis, 
+WITHOUT WARRANTY OF ANY KIND, either express or implied. See the 
+License for the specific terms governing rights and limitations under the 
+License. 
+
+The Initial Developer of this software is Andres Montano Pellegrini. Portions
+created by Andres Montano Pellegrini are Copyright 2001 Andres Montano
+Pellegrini. All Rights Reserved. 
+
+Contributor(s): ______________________________________.
+*/
+package org.thdl.tib.scanner;
+
+import java.io.*;
+import java.util.*;
+
+/** Designed to keep a log of the transactions taking place in the 
+    servlet version of the translation tool.
+    
+    @author Andr&eacute;s Montano Pellegrini
+*/
+
+public class ScannerLogger
+{
+    private String fileName;
+    private String lastIP;
+    
+    public ScannerLogger()
+    {
+		ResourceBundle rb = ResourceBundle.getBundle("dictionary");
+	    fileName = rb.getString("remotescannerfilter.log-file-name");
+	    lastIP = null;
+    }
+    
+    public String getCurrentTime()
+    {
+	    Calendar rightNow = Calendar.getInstance();
+	    return Integer.toString(rightNow.get(Calendar.YEAR)) + "\t" + Integer.toString(rightNow.get(Calendar.MONTH)) + "\t" + Integer.toString(rightNow.get(Calendar.DAY_OF_MONTH)) + "\t" + Integer.toString(rightNow.get(Calendar.HOUR_OF_DAY)) + "\t" + Integer.toString(rightNow.get(Calendar.MINUTE)) + "\t" + Integer.toString(rightNow.get(Calendar.SECOND));
+    }
+    
+    public void setUserIP(String lastIP)
+    {
+        this.lastIP = lastIP;
+    }
+    
+    synchronized public void writeLog(String s)
+    {	    
+        PrintStream pw = getPrintStream();
+        if (lastIP!=null) pw.print(lastIP);
+	    pw.println("\t" + getCurrentTime() + "\t" + s);
+	    pw.flush();
+	    pw.close();
+    }
+    
+    private PrintStream getPrintStream()
+    {
+        PrintStream pw;
+        try
+        {
+	        pw = new PrintStream(new FileOutputStream(fileName, true));
+	        return pw;
+	    }
+	    catch (Exception e)
+	    {
+	        e.printStackTrace();
+	    }
+	    return null;
+    }
+    
+    synchronized public void writeException(Exception e)
+    {
+        PrintStream pw = getPrintStream();
+	    e.printStackTrace(pw);
+	    pw.flush();
+	    pw.close();        
+    }
+}
\ No newline at end of file
diff --git a/source/org/thdl/tib/scanner/TibetanScanner.java b/source/org/thdl/tib/scanner/TibetanScanner.java
index 76cfc4f..c33c7cf 100644
--- a/source/org/thdl/tib/scanner/TibetanScanner.java
+++ b/source/org/thdl/tib/scanner/TibetanScanner.java
@@ -379,4 +379,5 @@ public abstract class TibetanScanner
 	public abstract void finishUp();
 	public abstract BitDictionarySource getDictionarySource();
 	public abstract String[] getDictionaryDescriptions();
+	public abstract void destroy();
 }