Exporting to DWG,

Scale exported as cm and not mm, I've set units to mm in all files as well as setting up the dwg seed but am still out by one decimal,

My workflow includes placing a newly created catalogue item, calling this from a parametric cell within a cell library, with the placement coordinates coming from a csv file 

The export process is manual by selecting - file, export, common file format, dwg...

Can you please point me to where or which variable needs to be set to ensure the master unit setting is not overridden.

I've seen posts asking the similar question over the years but no answer or resolve provided, I'm running ABD Connect

all help appreciated