I have been plotting with the legacy hidden shade plot for months with good results. Recently, when trying to plot to PDF, the ISO views plot correctly, but the ORTHO views plot with a gray-dashed border around the outside, including the part of the object that should be hidden. The 3D solids still plot correctly, it is only the piping that is plotteed incorrectly. Any suggestions would help. I have already tried to change the HIDEPRECISION to 1 with no result.