Hello every one. I have MasterCam 9.1 SP2 with Moldplus and Solids. I work with MasterCam since version 7, and in with solids only on version 9. Every time I want to do something I convert every thing to surfaces, then separate cavity from core with Moldplus. After that I convert again to solids and start working with solids... I think this is not a good way of working, but I cant do everything only with solids... I contact my MasterCam dealer and he tell me that I must use Moldplus to do this work. Now, I'm ask you, if somebody knows how to work only with solids, because other software can do that, and I lost lots of information converting to surfaces, and then to solids again, an wish to work only in solids... Kind regards for all Luis Cortes