text: """
  Units exception classes
  """
  
  
  class UnitSystemNotFound(Exception):
      """
      UnitSystem not found exception
      """
      message = "Unit system name is not valid"
  
  
  class DimensionNotFound(Exception):
      """
      Dimension not found exception
      """
      message = "Dimension not found in the registry"
  
  
  class UnitNotFound(Exception):
      """
      Unit not found exception
      """
      message = "Unit not found in the registry"
  
  
  class UnitDuplicateError(Exception):
      """
      Error duplicating unit
      """
      message = "Unit with the same code already exists in the registry"
  
  
  class UnitValueError(Exception):
      """
      Error creating unit
      """
      message = "Unit values are inconsistent"
  
  
  class UnitDimensionError(Exception):
      """
      Invalid dimension for the unit system
      """
      message = "Unit dimensionality is not valid for the registry"
  
  
  class UnitConverterInitError(Exception):
      """
      Converter cannot be initialized
      """
      message = 'Error during initialization of converter'
  
  
  class UnitConverterConvertError(Exception):
      """
      Error converting units
      """
      message = 'Error converting values'
  