message: Fixed issue with invalid parameter.
diff: @@ -120,7 +120,6 @@ class MBTR(Descriptor):
  self._axis_k2 = None
  self._axis_k3 = None
  -
  def update(self):
  '''
  Checks and updates variables in mbtr class
  @@ -142,7 +141,7 @@ class MBTR(Descriptor):
  )
  if not self.k.issubset(supported_k):
  raise ValueError(
  - "The given k parameter '{}' has at least one invalid k value".format(k)
  + "The given k parameter '{}' has at least one invalid k value".format(self.k)
  )
  # Check the weighting information
  