When I try and plot a hidden vieport the vertical pipes in the drawing plot with a line missing. Only one side of the pipe, say left side plots and the right side line, that should be there as a result of the curvature, is missing. It happens in both full preview and when plotting, but not in model space. Kinda odd, I tried making the line weight thicker, thinking it was maybe just too thin, but it doesn’t help. I’m using AutoCAD 2004 on win xp and plotting to a HP 130. Any subjections?