Anybody who used ANY library to process xslx knows MS keeps changing it :-)

I highly doubt that, also, people in corporate finance do not use libraries to process excel files.

About ranges… can you give me the range for whole columns minus 6 first records and 9 last records?

=OFFSET(range_name, 7, COLUMNS(range_name), ROWS(range_name)-9) where range_name is the label given to the whole table.