diff --git a/processing/post/addCompatibilityMismatch.py b/processing/post/addCompatibilityMismatch.py
index 9a2bd1a5b..0b6a0e256 100755
--- a/processing/post/addCompatibilityMismatch.py
+++ b/processing/post/addCompatibilityMismatch.py
@@ -13,85 +13,6 @@ import damask
 scriptName = os.path.splitext(os.path.basename(__file__))[0]
 scriptID   = ' '.join([scriptName,damask.version])
 
-def volTetrahedron(coords):
-  """
-  Return the volume of the tetrahedron with given vertices or sides.
-
-  If vertices are given they must be in a NumPy array with shape (4,3): the
-  position vectors of the 4 vertices in 3 dimensions; if the six sides are
-  given, they must be an array of length 6. If both are given, the sides
-  will be used in the calculation.
-
-  This method implements
-  Tartaglia's formula using the Cayley-Menger determinant:
-              |0   1    1    1    1  |
-              |1   0   s1^2 s2^2 s3^2|
-    288 V^2 = |1  s1^2  0   s4^2 s5^2|
-              |1  s2^2 s4^2  0   s6^2|
-              |1  s3^2 s5^2 s6^2  0  |
-  where s1, s2, ..., s6 are the tetrahedron side lengths.
-
-  from http://codereview.stackexchange.com/questions/77593/calculating-the-volume-of-a-tetrahedron
-  """
-  # The indexes of rows in the vertices array corresponding to all
-  # possible pairs of vertices
-  vertex_pair_indexes = np.array(((0, 1), (0, 2), (0, 3),
-                                  (1, 2), (1, 3), (2, 3)))
-
-  # Get all the squares of all side lengths from the differences between
-  # the 6 different pairs of vertex positions
-  vertices =  np.concatenate((coords[0],coords[1],coords[2],coords[3])).reshape(4,3)
-  vertex1, vertex2 = vertex_pair_indexes[:,0], vertex_pair_indexes[:,1]
-  sides_squared = np.sum((vertices[vertex1] - vertices[vertex2])**2,axis=-1)
-
-
-  # Set up the Cayley-Menger determinant
-  M = np.zeros((5,5))
-  # Fill in the upper triangle of the matrix
-  M[0,1:] = 1
-  # The squared-side length elements can be indexed using the vertex
-  # pair indices (compare with the determinant illustrated above)
-  M[tuple(zip(*(vertex_pair_indexes + 1)))] = sides_squared
-
-  # The matrix is symmetric, so we can fill in the lower triangle by
-  # adding the transpose
-  M = M + M.T
-  return np.sqrt(np.linalg.det(M) / 288)
-
-
-def volumeMismatch(size,F,nodes):
-  """
-  Calculates the volume mismatch.
-
-  volume mismatch is defined as the difference between volume of reconstructed
-  (compatible) cube and determinant of deformation gradient at Fourier point.
-  """
-  coords = np.empty([8,3])
-  vMismatch = np.empty(F.shape[:3])
-
-#--------------------------------------------------------------------------------------------------
-# calculate actual volume and volume resulting from deformation gradient
-  for k in range(grid[0]):
-    for j in range(grid[1]):
-      for i in range(grid[2]):
-        coords[0,0:3] = nodes[k,  j,  i  ,0:3]
-        coords[1,0:3] = nodes[k  ,j,  i+1,0:3]
-        coords[2,0:3] = nodes[k  ,j+1,i+1,0:3]
-        coords[3,0:3] = nodes[k,  j+1,i  ,0:3]
-        coords[4,0:3] = nodes[k+1,j,  i  ,0:3]
-        coords[5,0:3] = nodes[k+1,j,  i+1,0:3]
-        coords[6,0:3] = nodes[k+1,j+1,i+1,0:3]
-        coords[7,0:3] = nodes[k+1,j+1,i  ,0:3]
-        vMismatch[k,j,i] = \
-        (  abs(volTetrahedron([coords[6,0:3],coords[0,0:3],coords[7,0:3],coords[3,0:3]])) \
-         + abs(volTetrahedron([coords[6,0:3],coords[0,0:3],coords[7,0:3],coords[4,0:3]])) \
-         + abs(volTetrahedron([coords[6,0:3],coords[0,0:3],coords[2,0:3],coords[3,0:3]])) \
-         + abs(volTetrahedron([coords[6,0:3],coords[0,0:3],coords[2,0:3],coords[1,0:3]])) \
-         + abs(volTetrahedron([coords[6,0:3],coords[4,0:3],coords[1,0:3],coords[5,0:3]])) \
-         + abs(volTetrahedron([coords[6,0:3],coords[4,0:3],coords[1,0:3],coords[0,0:3]]))) \
-        /np.linalg.det(F[k,j,i,0:3,0:3])
-  return vMismatch/(size.prod()/grid.prod())
-
 
 def shapeMismatch(size,F,nodes,centres):
   """
@@ -155,10 +76,6 @@ parser.add_option('--no-shape','-s',
                   dest = 'shape',
                   action = 'store_false',
                   help = 'omit shape mismatch')
-parser.add_option('--no-volume','-v',
-                  dest = 'volume',
-                  action = 'store_false',
-                  help = 'omit volume mismatch')
 parser.set_defaults(pos     = 'pos',
                     defgrad = 'f',
                     shape   = True,
@@ -185,10 +102,4 @@ for name in filenames:
                       shapeMismatch.reshape(-1,1,order='F'),
                       scriptID+' '+' '.join(sys.argv[1:]))
 
-  if options.volume:
-    volumeMismatch = volumeMismatch(size,F,nodes)
-    table = table.add('volMismatch(({}))'.format(options.defgrad),
-                      volumeMismatch.reshape(-1,1,order='F'),
-                      scriptID+' '+' '.join(sys.argv[1:]))
-
   table.save((sys.stdout if name is None else name), legacy=True)