diff --git a/tools/munger/scripts/error_gen.py b/tools/munger/scripts/error_gen.py
new file mode 100644
index 0000000..7dff087
--- /dev/null
+++ b/tools/munger/scripts/error_gen.py
@@ -0,0 +1,75 @@
+#!/usr/bin/python
+#
+# This python script generates error subclasses
+#
+
+import re
+
+print """
+# Python OpenFlow error wrapper classes
+
+from ofp import *
+
+# This will never happen; done to avoid lint warning
+if __name__ == '__main__':
+    def of_message_parse(msg): return None
+
+"""
+
+################################################################
+#
+# Error message subclasses
+#
+################################################################
+
+# Template for error subclasses
+
+template = """
+class --TYPE--_error_msg(ofp_error_msg):
+    \"""
+    Wrapper class for --TYPE-- error message class
+    \"""
+    def __init__(self):
+        ofp_error_msg.__init__(self)
+        self.header = ofp_header()
+        self.header.type = OFPT_ERROR
+        self.type = --ERROR_NAME--
+        self.data = ""
+
+    def pack(self, assertstruct=True):
+        self.header.length = self.__len__()
+        packed = ofp_error_msg.pack(self)
+        packed += self.data
+
+    def unpack(self, binary_string):
+        binary_string = ofp_error_msg.unpack(self, binary_string)
+        self.data = binary_string
+        return []
+
+    def __len__(self):
+        return OFP_HEADER_BYTES + OFP_ERROR_MSG_BYTES + len(self.data)
+
+    def show(self, prefix=''):
+        print prefix + "--TYPE--_error_msg"
+        ofp_error_msg.show(self)
+        print prefix + "data is of length " + len(self.data)
+        obj = of_message_parse(self.data)
+        if obj != None:
+            obj.show()
+        else:
+            print prefix + "Unable to parse data"
+"""
+
+error_types = [
+    'hello_failed',
+    'bad_request',
+    'bad_action',
+    'flow_mod_failed',
+    'port_mod_failed',
+    'queue_op_failed']
+
+for t in error_types:
+    error_name = "OFPET_" + t.upper()
+    to_print = re.sub('--TYPE--', t, template)
+    to_print = re.sub('--ERROR_NAME--', error_name, to_print)
+    print to_print