diff --git a/tools/convert-mesh/bin/convert-mesh.py b/tools/convert-mesh/bin/convert-mesh.py
index de4a2111..8e2e44a5 100644
--- a/tools/convert-mesh/bin/convert-mesh.py
+++ b/tools/convert-mesh/bin/convert-mesh.py
@@ -190,37 +190,38 @@ if armature is not None:
 		bones.append((p, tuple(b.head_local), tuple(map(tuple, b.matrix_local.to_3x3()))))
 
 poses = []
-for index, pose in enumerate(bpy.data.objects['armature'].pose_library.pose_markers):
-	print("Found pose", pose.name)
+if armature is not None:
+	for index, pose in enumerate(bpy.data.objects['armature'].pose_library.pose_markers):
+		print("Found pose", pose.name)
 
-	# [rotation, scale, translation]
-	data = []
-	for i in range(len(bone_names)):
-		data.append([[None, None, None, None], [None, None, None], [None, None, None]])
+		# [rotation, scale, translation]
+		data = []
+		for i in range(len(bone_names)):
+			data.append([[1.0, 0.0, 0.0, 0.0], [1.0, 1.0, 1.0], [0.0, 0.0, 0.0]])
 
-	marker = armature.pose_library.pose_markers[index]
-	frame = marker.frame
-	action =  bpy.data.actions[armature.pose_library.name]
-	for g in action.groups:
-		if not g.name in bone_names:
-			continue
-		bone_index = bone_names.index(g.name)
-		for ch in g.channels:
-			value = ch.evaluate(float(frame))
-			if ch.data_path.find('rotation_quaternion') != -1:
-				data[bone_index][0][ch.array_index] = value
-			elif ch.data_path.find('scale') != -1:
-				data[bone_index][1][ch.array_index] = value
-			elif ch.data_path.find('location') != -1:
-				data[bone_index][2][ch.array_index] = value
+		marker = armature.pose_library.pose_markers[index]
+		frame = marker.frame
+		action =  bpy.data.actions[armature.pose_library.name]
+		for g in action.groups:
+			if not g.name in bone_names:
+				continue
+			bone_index = bone_names.index(g.name)
+			for ch in g.channels:
+				value = ch.evaluate(float(frame))
+				if ch.data_path.find('rotation_quaternion') != -1:
+					data[bone_index][0][ch.array_index] = value
+				elif ch.data_path.find('scale') != -1:
+					data[bone_index][1][ch.array_index] = value
+				elif ch.data_path.find('location') != -1:
+					data[bone_index][2][ch.array_index] = value
 
-	new_data = []
-	for d in data:
-		rotation = tuple([d[0][1], d[0][2], d[0][3], d[0][0]])
-		scale = d[1][0]
-		translation = tuple(d[2])
-		new_data.append((rotation, scale, translation))
-	poses.append((pose.name, new_data))
+		new_data = []
+		for d in data:
+			rotation = tuple([d[0][1], d[0][2], d[0][3], d[0][0]])
+			scale = d[1][0]
+			translation = tuple(d[2])
+			new_data.append((rotation, scale, translation))
+		poses.append((pose.name, new_data))
 
 def to_bytes(obj):
 	if type(obj) == Uint8:
@@ -245,6 +246,8 @@ def to_bytes(obj):
 	if type(obj) == str:
 		b = obj.encode('utf-8')
 		return struct.pack('<I', len(b)) + b
+	print("Type", type(obj), "not supported")
+	sys.exit(1)
 
 SECTION_MESH  = 1
 SECTION_BONES = 2