I've encountered a problem with the PDFs that are generated from 2012 using Acroplot Pro. The only thing that has changed, AFAIK, is the version of AutoCAD and the page set-up to go with the newer CAD as the old ones don't work well. The problem is not in making the PDFs but the plotting of the PDFs. Using Adobe Reader, each individual sheet needs to be "flattened" but there isn't any 3D aspects to these files. Some of them take several minutes for this process. Many of them take up to a minute. A set of 50 drawings takes forever to plot. The file sizes are about the same as the ones generated from the older CAD.
Does anyone know why these need to be "flattened" and what I can do to eliminate this?