AutoCAD Architecture 2010 - Monochrome.ctb plot style table missing
Accepted solution
Are you being offered CTB files as the choice for your plot, and it is just the monochrome.ctb file that is missing? Is your drawing set up to use color-dependent plot styles? If not, you will not be offered any CTB files as a choice, only STB files.
Start new files with a template that uses the desired plot style type; use the CONVERTPSTYLES command to change from STB to CTB, if necessary, in an existing file.
thanks david,
save me lots of time 
Thank you David!
I know this thread is a couple years old, but awesome commands and awesome users are forever appreciated 
Do you have the plot style files you want to use in a folder in the Plot Style Table Search Path (Options dialog, Files tab, Printer File Support Path node, Plot Style Table Search Path sub-node)? In 2014 and later, you can specify multiple folders under this node. In earlier releases, you are limited to one folder (but you can place a Windows Shortcut in that folder pointing to another folder if you do not want all of your plot styles in that one folder for some reason).
If your drawing cannot find the specified plot style file, then it will default to plotting using the colors defined in the drawing file (definitely true for named plot style files [STB]; may be true for color-dependent plot style files [CTB] as well).
