I have an infuriating problem in that I have a DWG file that looks fine in it's origin, but when I load the DWG into FME 2013 SP3 several elements that compose a block lose their z value. I can see the z values in the DWG but by the time FME reads it some of them have gone. There are no warnings or errors it simply seems to lose the height, any thoughts appreciated...