Hi, I hope you can help me.I have this issue where I have added a .ctb style to the Plot Styles directory folder but when I want to choose it in the page set up dialog box it doesn't appear. I have checked that the program is pointing at the correct folder. Also I have checked that .ctb is the format to be used (also I see all other plot styles from the folder). The drawing is a conversion from Smartplant to .dwg delivered to me and the .ctb file is delivered also by same company.  Thank you in advance. Regards,Anja

Go into Options, Plot and Publish tab, lower right pick Plot Style Table Settings, pick Use color Dependent plot styles and see if that makes any difference.

I now tried to follow the path you mention and I see that the option is already picked. 

Then I'd check that the .ctb file is actually where AutoCAD expects it to be.  How did you determine the proper location in the first place?