docs: def FMErrorByNum( num ):
      """This function raises an error based on the specified error code."""
  
      if not num in FMErrorNum.keys():
          raise FMServerError, (num, FMErrorNum[-1])
      elif num == 102:
          raise FMFieldError, (num, FMErrorNum[num])
      else:
          raise FMServerError, (num, FMErrorNum[num])