diff --git a/src/main/java/com/metaweb/gridworks/history/History.java b/src/main/java/com/metaweb/gridworks/history/History.java
index 3eba08dbd..227276549 100644
--- a/src/main/java/com/metaweb/gridworks/history/History.java
+++ b/src/main/java/com/metaweb/gridworks/history/History.java
@@ -50,7 +50,7 @@ public class History implements Jsonizable {
         return (Change) load.invoke(null, reader, pool);
     }
     
-    static public void writeOneChange(OutputStream out, Change change, Pool pool) throws Exception {
+    static public void writeOneChange(OutputStream out, Change change, Pool pool) throws IOException {
         Writer writer = new OutputStreamWriter(out);
         try {
             History.writeOneChange(writer, change, pool);
@@ -59,14 +59,18 @@ public class History implements Jsonizable {
         }
     }
     
-    static public void writeOneChange(Writer writer, Change change, Pool pool) throws Exception {
-        writer.write(Gridworks.getVersion()); writer.write('\n');
-        writer.write(change.getClass().getName()); writer.write('\n');
-            
+    static public void writeOneChange(Writer writer, Change change, Pool pool) throws IOException {
         Properties options = new Properties();
         options.setProperty("mode", "save");
         options.put("pool", pool);
         
+        writeOneChange(writer, change, options);
+    }
+    
+    static public void writeOneChange(Writer writer, Change change, Properties options) throws IOException {
+        writer.write(Gridworks.getVersion()); writer.write('\n');
+        writer.write(change.getClass().getName()); writer.write('\n');
+            
         change.save(writer, options);
     }
     
diff --git a/src/main/java/com/metaweb/gridworks/model/changes/MassChange.java b/src/main/java/com/metaweb/gridworks/model/changes/MassChange.java
index a9011308f..f5ab78c2b 100644
--- a/src/main/java/com/metaweb/gridworks/model/changes/MassChange.java
+++ b/src/main/java/com/metaweb/gridworks/model/changes/MassChange.java
@@ -49,7 +49,7 @@ public class MassChange implements Change {
         writer.write("updateRowContextDependencies="); writer.write(Boolean.toString(_updateRowContextDependencies)); writer.write('\n');
         writer.write("changeCount="); writer.write(Integer.toString(_changes.size())); writer.write('\n');
         for (Change c : _changes) {
-            c.save(writer, options);
+        	History.writeOneChange(writer, c, options);
         }
         writer.write("/ec/\n"); // end of change marker
     }