If you are importing more than 52 trains at a time, some will be missed... with some investigation I found it's entries in columns AZ, BZ, CZ... any column ending with Z other than column Z in fact. (Also columns from AAA onwards... but AAA is column 703 and it's unlikely anyone will be importing seven hundred workings on a single worksheet, right...?)
I've narrowed it down to StringExtension.ToExcelColumn which converts 52 to B@ instead of AZ
If you are importing more than 52 trains at a time, some will be missed... with some investigation I found it's entries in columns AZ, BZ, CZ... any column ending with Z other than column Z in fact. (Also columns from AAA onwards... but AAA is column 703 and it's unlikely anyone will be importing seven hundred workings on a single worksheet, right...?)
I've narrowed it down to
StringExtension.ToExcelColumnwhich converts 52 toB@instead ofAZ