Well, to those who recognise the title of the post, this AutoCAD error message may be one you’ve come accross before, however, for the benefit of all; i’ll go into a little more detail.

Working on some drawings recently, i found that when it came to plotting out the layout, the “Plot style table (pen assignments)” were missing! (As the following image of the plot window shows, to the top-right)

One reason suggested for this is 3rd party xrefs altering the plot style settings, but i’m open on being corrected if that’s not the right answer. Anyway, the fix is a lot more straightforward than trying to figure out the reason. All you have to do is type “CONVERTPSTYLES” as a command type in either model or paper space and you get the following message.

On this step the work has all been done for me; the handy little pop-up message explains it all… Once you’ve hit “OK” the command then runs the fix and… voila! it’s done. Now continue as you would normally and go to plot the drawing; you should see the following plot window with all the plot styles back to normal!

Select the desired plot style and there you have it! All courtesy of Tom (the genius) Potter. So please forward all thanks onto him.