AutoCAD 2010/2011/2012 DWG Format

[#1]

While batch plotting to a multi page PDF in AutoCad 2012 using Adobe Acrobat:

My pages come out with a blank / empty viewport,

The title block is on the page and nothing else plots on the page.

This is only happening with one of the files I am working in.  Other DWGs are PDFing normal.

[#2]

My guess would be that your viewport is on a layer that has been turned off or frozen

[#3]

Check the pagesetup you are using with that file, ensure the parameters are what you want.