diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2d891ef..5c93705 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 2.8.12)
+cmake_minimum_required(VERSION 3.5)
 #SET(CMAKE_SHARED_LIBRARY_LINK_C_FLAGS "")
 #SET(CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS "")
 
diff --git a/r2/mega_genmsg.py b/r2/mega_genmsg.py
index c727f5d..ea65b50 100755
--- a/r2/mega_genmsg.py
+++ b/r2/mega_genmsg.py
@@ -32,6 +32,22 @@ def deserialize(self, name, cur_alignment, f):
     f.write("  printf(\"deserialization of {0} not implemented!\");\n".format(self.name))
     f.write("  exit(1);\n")
 
+  def serialize_fixed_array(self, field_name, cur_alignment, array_size, f):
+    f.write("  printf(\"serialization fixed array of {0} not implemented!\");\n".format(self.name))
+    f.write("  exit(1);\n")
+
+  def deserialize_fixed_array(self, field_name, cur_alignment, array_size, f):
+    f.write("  printf(\"deserialization fixed array of {0} not implemented!\");\n".format(self.name))
+    f.write("  exit(1);\n")
+
+  def serialize_variable_array(self, field_name, cur_alignment, f):
+    f.write("  printf(\"serialization variable array of {0} not implemented!\");\n".format(self.name))
+    f.write("  exit(1);\n")
+
+  def deserialize_variable_array(self, field_name, cur_alignment, f):
+    f.write("  printf(\"deserialization variable array of {0} not implemented!\");\n".format(self.name))
+    f.write("  exit(1);\n")
+
 class BooleanType(PrimitiveType):
   def __init__(self):
     super(BooleanType, self).__init__('bool', 1)
@@ -140,7 +156,7 @@ def deserialize_variable_array(self, field_name, cur_alignment, f):
 def uncamelcase(camelcase):
   lower = ""
   upper_run_len = 0
-  for idx in xrange(0, len(camelcase)):
+  for idx in range(0, len(camelcase)):
     #print(camelcase[idx])
     if (camelcase[idx].isupper()):
       next_lower = idx < len(camelcase)-1 and camelcase[idx+1].islower()