I am working on drawings converted [by someone else] from DataCAD to AutoCAD. These drawings have been converted to the firm's usual layers and settings using match properties and purging the old layers. The settings are attached to a ctb which assigns line weight to colours.
Yesterday the line weights were plotting properly, however today when i tried to print, everything printed with the same line weight from paper space [as if i had just used the monochrome setting - which i hadn't], however when i printed from model space the line wieghts appeared again, using the same ctb.
The PSLTSCALE is correct  , the LTSCALE remains the same with attempts to print from MS and PS. "plot with plot styles" is selected. When I switch the 'show line weights' on, the line wieghts are also visible in PS.
All the line types are there, just the weights have gone missing
I dont know what I could have clicked on or selected between yesterday and today to do this.