Yes, i can open stand-alone Spaceclaim (SDCM 18.2) and i can design in it but the problem is that when opening it through Workbench the error message is displayed and cannot attach a geometry to workbench, so i think exactly problem is because of configuration issue between Workbench and SpaceClaim. I am using a external NVIDIA GEFORCE GT 710 (2GB) graphics card, 3 GB RAM and OS with windows 7 (64 bit). Please help me any one in resolving this issue as soon as possible.

Thanks in advance.