Youu need a bom format. This is a text file put in with your configs, you can create it in Notepad then change the file extension to .fmt, see below.
My format is called bom_current.fmt,
This is the syntax:
.breakdown
%$type %$name contains items
.titles Part Number;|Issue;|Description;|Qty;|Mass(kg);|Material;
.row %$name[-14.14s];|%issue_no[-3d];|%description[-40.40S];|%$quantity[3d];|%mass[-5.2f];|%material[-35.35S];
Note that there must be a blank line at the end or it won't work.
In square brackets the first number is the allowed qty of characters, second is how many are used or qty of decimals, s refers to string, d refers to integer values, f refers to decimals. Obviously the parameter names may need to be changed to suit your own parameters.
You will need the following line put into your config.pro, so the format file can be located.
bom_format <path to file>\bom_current.fmt