text: class SpicerError(Exception):
      pass
  
  
  class SpiceError(SpicerError):
      def __init__(self, function):
          self.function = function
  
      def __str__(self):
          return "SPICE: Calulating {} failed.".format(self.function)
  
  
  class MissingParameterError(SpicerError):
      def __init__(self, txt):
          self.txt = txt
  
      def __str__(self):
          return "Parameter missing: {}".format(self.txt)
  
  
  class SPointNotSetError(SpicerError):
      def __init(self, txt):
          self.txt = txt
  
      def __str__(self):
          return "Surface point has not been set. {}".format(self.txt)
  