CAD solution for mold making: slider design, guide rails, jacks,
mold base, components and process, coolant circuit, control via mold levels, creation of drawings, parts lists...
Well I'm attempting my first mold in 2008. I inserted my part as normal. But when I went and tried to create my Parting Lines it would not let me select the part. I could select the part hiding in the background then it would. So I got my Parting Lines finally created. So I went to create the "Shell Parts command" I can't select a PART. I went to create a Core/Cavity Block. It will not let me select the PART.
Try "blanking" or turning of the part on the screen. Then turn the part back on from the visualization menu. This will insure that you don't have the "no holes part" visible by accident.