Bricscad platinium v18 plot preview with previous papersize fails

Bricscad wants to go to A4 to print but the printer is a Canon TM305 so 36 inch rol
If I select print, then print previeuw then a manu pops up Previous paper size detected, OK to use A4 and if OK selected then the preview uses A4, if no selected then back to print command.
Why can't Bricscad work with previous paper sizes?

Windows10 pro, Threadripper , 128GB ram, Radeon FX350 no harddisk , all SSD.