Basic troubleshooting for when you cannot start Softimage, or you get strange errors at startup, or you cannot perform basic tasks such as creating primitives or duplicating objects. Or for fixing Softimage after you run a registry cleaner.
Run runonce.bat to re-register the Softimage DLLs and SPDL files (SPDL files describe the parameters of objects and operators in Softimage).
runonce.bat does a lot of what happens during installation and it is a lot faster than removing and then reinstalling Softimage.
runonce.bat mentions on xsibase, si-community, the AREA, and the XSI list