I have a D size drawing with an isometric view of a large diesel engine we use. The engine part model is imported surfaces with some of the surfaces colored and we use the colored display state in the drawing. file size is about 24MB. The problem is, we can not get the file to save as PDF in color, print in color, or print to PDF in color as displayed in the drawing. It creates the PDF fine but turns the model into wireframe black and white. We have other files we do the same thing for and saving to PDF in color works fine. I've gone through all the print and page setup options and can not for the life of me figure out what's going on. Is it a bug? Thanks for the help