Hi, I want to start modding so decide to change some stats on a Clan specific unit just to train myself.

So I changed some stats on the Chosokabe Bow Ashigaru in "unit_stats_land", applied the changes, and then start up BOB.
Clicked on "unit_stats_land" on the left column, clicked on "unit_stats_land" on middle column, and checked the tick marks on data/mod.pack
Clicked Start

And got this error/warning message under "Database Export":
execute add_unit_stats_land_table "e:\steam\steamapps\common\total war shogun 2\modding\raw_data\EmpireDesignData\unit_stats_land.xml" e:\steam\steamapps\common\total war shogun 2\modding\working_data\db\unit_stats_land_tables\unit_stats_land There is no pack file to add a file to.
Incorrect flag war specified - should be append or replace
add_unit_stats_land_table did not parse the entire stream - shogun 2\modding\working_data\db\unit_stats_land_tables\unit_stats_land remained unused.

I tried the mod anyway, but none of the changes showed up in game. I don't have any other mods on, and I start a new campaign using Chosokabe clan. This is for the Vanilla Shogun 2 campaign.

What did I do wrong? Some help is appreciated.

Thanks in advance.