I am experiencing a similar problem. I am using a Quad-core Intel CPU based Dell XPS running Windows Vista Business and AutoCAD Map 3D 2009 plotting to an HP DesignJet T1100ps. Almost all the time everything works just fine, but I have one map that consistently seems to give me problems. It has a 300 meg bitmap attached to it, and I can almost never get it to print correctly, either to paper or PDF.
When I plot AutoCAD acts like everything is working just fine, but just before it returns control to me, after the plotting status dialog box closes, another dialog box pops up for just a second or two and says, "Attempting to cancel plot: Layout 1". The plot will come out just fine in every respect, except that the bitmap doesn't print.
I converted the .bmp file to .png, which is now 22 megs, but nothing has changed. I've audited the drawing just for good measure, but no errors are ever found. I've even tried pushing the title block into modelspace and plotting from there, but no difference.
Any help anyone can provide would be greatly appreciated.
Sean Hetrick