diff --git a/compiler/base/vector.py b/compiler/base/vector.py
index 7339c472..6533e09e 100644
--- a/compiler/base/vector.py
+++ b/compiler/base/vector.py
@@ -14,13 +14,15 @@ class vector():
     def __init__(self, x, y=None):
         """ init function support two init method"""
         # will take single input as a coordinate
-        if y==None:
+        if len(x)==2:
             self.x = float(x[0])
             self.y = float(x[1])
         #will take two inputs as the values of a coordinate
-        else:
+        elif y:
             self.x = float(x)
             self.y = float(y)
+        else:
+            debug.error("Invalid vector specification.",-1)
 
     def __str__(self):
         """ override print function output """
diff --git a/compiler/gdsMill/gdsMill/vlsiLayout.py b/compiler/gdsMill/gdsMill/vlsiLayout.py
index 93436a73..f3ce204c 100644
--- a/compiler/gdsMill/gdsMill/vlsiLayout.py
+++ b/compiler/gdsMill/gdsMill/vlsiLayout.py
@@ -619,7 +619,8 @@ class VlsiLayout:
         
     def updateBoundary(self,thisBoundary,cellBoundary):
         [left_bott_X,left_bott_Y,right_top_X,right_top_Y]=thisBoundary
-        if cellBoundary==[None,None,None,None]:
+        # If any are None
+        if cellBoundary[0]==None or cellBoundary[1]==None or cellBoundary[2]==None or cellBoundary[3]==None:
             cellBoundary=thisBoundary
         else:
             if cellBoundary[0]>left_bott_X: