# Source code for openpyxl.utils.exceptions

    # Copyright (c) 2010-2024 openpyxl

    """Definitions for openpyxl shared exception classes."""

    class CellCoordinatesException(Exception):
        """Error for converting between numeric and A1-style cell references."""

    class IllegalCharacterError(Exception):
        """The data submitted which cannot be used directly in Excel files. It
        must be removed or escaped."""

    class NamedRangeException(Exception):
        """Error for badly formatted named ranges."""

    class SheetTitleException(Exception):
        """Error for bad sheet names."""

    class InvalidFileException(Exception):
        """Error for trying to open a non-ooxml file."""

    class ReadOnlyWorkbookException(Exception):
        """Error for trying to modify a read-only workbook"""

    class WorkbookAlreadySaved(Exception):
        """Error when attempting to perform operations on a dump workbook
        while it has already been dumped once"""