diff --git a/interp/tools.py b/interp/tools.py
index d3a3efd..d167bd5 100644
--- a/interp/tools.py
+++ b/interp/tools.py
@@ -32,15 +32,6 @@ def get_logger(filename, level = logging.DEBUG, logger_name = 'pymoab', size = 2
 
 log = get_logger(filename = '/tmp/interp.log')
 
-class smberror(Exception):
-  """
-    this is a silly little exception subclass
-  """
-  def __init__(self, val):
-    self.value = val
-  def __str__(self):
-    return repr(self.value)
-
 def rms(errors):
   """
     root mean square calculation
@@ -56,7 +47,7 @@ def exact_func(X):
     the exact function used from baker's article (for testing)
   """
   x = X[0]
-  y = X[0]
+  y = X[1]
   return np.power((np.sin(x * np.pi) * np.cos(y * np.pi)), 2)
 
 def exact_func_3D(X):