We've had some issues that have come up in the past with intermittent Curtain Wall panels not printing. We first noticed this with PDF exports, but then tried printing straight to our printers and plotters with the same result. This was also first discovered in version 2013, however I've opened the same files in 2014 and 2015, and the same issue occurs. If we plot the same view using the Raster Processing option, they do print, however the quality of the plot is diminished.
Has anybody else encountered this issue?