In AQ Designer you have the ability to create Batchplots and sheet sets to PDF. Occasionally you might run into a problem when selecting saved sheets and selecting your out put method to be PDF, this will save as a .DSD file type.
To correct the CAD out put to PDF you will need to type:
BACKGROUNDPLOT in the AutoCAD command line.
Change the command variable from <2> to 1.
Then you will be able to BATCHPLOT to PDF.