Issue:
How to convert drawing files correctly in AutoCAD Products from being CTB based to STB, taking the possible warning messages into account, to ensure that the PDF or physical print output is displayed correctly.
Solution:
The entire process, at least when doing it the first time, is a two-part process consisting of two commands:
- CONVERTPSTYLE
- CONVERTCTB
If done in the wrong order Warning messages will appear, such as:

Note: This Warning message will always display as a reminder to have a proper STB, which can be used for the conversion process.

Note: If this warning message should appear, it means that the STB selected for the CONVERTPSTYLES command, does not contain any color mapping table information and therefore can’t be used.
The correct steps to follow are:
- Use the CONVERTCTB command.
- Select any CTB related plot style and save it with at a desired file location.
- Use the CONVERTPSTYLES command.
- Confirm the Warning message to open the file selection dialog box.
- Navigate to the previously created STB, select it and confirm with Open.
After that the drawing which previously was in Color Dependent Mode is now converted to Named plot style mode.
