Simulate Early, Simulate Often... In Rhino
I don't know if it matters, but the latest version of Rhino 4 is SR9. Are you running on something other than Intel?
I am running on AMD Athlon 1.8 GHZ, 512 RAM DDR, Ge Force 2 MX 400, Windows XP SP3.
It is interesting that Scan & Solve 1.6 worked on Rhino SR8 too, but different configuration:
Intel Core 2 Duo E4300 1800MHz
motherboard: MSI P4M890M3-V (MS-7255)
2x1GB DDR2 266 Mhz
I suspect there is an incompatibility between the Intel-compiled code in Scan&Solve and the AMD processor. With some AMD processors, we've seen an error message about KMP_AFFINITY. A workaround for that is here: http://www.scan-and-solve.com/page/kmp-affinity
Do you get an error message of any sort?