diff -urN CommandIO.rb.orig CommandIO.rb
--- CommandIO.rb.orig	2002-01-24 00:27:44.000000000 +0100
+++ CommandIO.rb	2013-06-25 07:11:02.562537569 +0200
@@ -46,8 +46,8 @@
       fileName = nextLogFile
       @logFile.close
       @logFile = File.new(fileName, "r+")
-    end 
-    Marshal.load @logFile
+    end
+    Marshal.load(@logFile) unless @logFile.eof?
   end
  
   def writeCommand(command)
diff -urN Mnemonic.rb.orig Mnemonic.rb
--- Mnemonic.rb.orig	2002-01-24 02:42:32.000000000 +0100
+++ Mnemonic.rb	2013-06-25 07:25:41.369520673 +0200
@@ -131,7 +131,8 @@
 
   def recoverCommands
     while(!@commandIO.eof?)
-      @commandIO.nextCommand.execute(system)
+      command = @commandIO.nextCommand
+      command.execute(system) if command
     end
   end