TypeError: unorderable types: int() < NoneType()

[Andrei Sura]

I encountered the following

while current_row_in_file_index < row_count: TypeError: unorderable types: int() < NoneType()

It seems related to the fact that in some cases row_count resolves to None:

line 590 row_count = self.header.properties.row_count

[Matt]

I saw similar behavior. After __init__ cached_page was blank and it hadn’t read the row_count. I don’t know if this is the proper solution but for me I was able to resolve by simply caching the first page after the header. I added the following lines to the end of init

    if self.properties.row_count is None:
        if self.cached_page == b'':
            self._file.seek(self.properties.header_length)
            self._read_next_page()

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