I am also having this exact same problem with a Windows Server 2008 OS. I have i7 with 32 GB RAM. Number of iterations until failure varies, but the failure itself is very repeatable.
As the models get larger, the number of iterations until failure is less.
What can be done? Our users are very frustrated with this.
After all types of simple models I create from or import into Fusion close unexpectedly during "solve", I have used Fusion example models as a baseline with success. Still, I have no idea what is incompatible because Fusion example models work and the same parameters with models .
You cannot solve on mapped network drives, for example, B:\ drive mapped to \\company\server\path\folder. However, if you open the design study using the unc path, \\company\server\path\folder, you should be able to solve and get results. We have a bug logged for the mapped network drive issue. Did you try solving on a UNC path?
Herman, my colleague faced solver related similar behaviour for HiTech CFD simulation and analysis. However for smaller CFD simulation and analysis it works fine.