I have been having this problem with the Boson Exsim that comes with the Odom book. It all works fine until you run a Simulator Question and then it throws out an error "Command set failed to load". The Simulator question loads but you can't run commands on the devices in the Question. I tried the instructions from Boson's Website for this Problem,
140 Error Command set failed to load - but it still aint working
Run as Administrator didn't work. I am not sure if .Net Framework 3.5 has been replaced since that webpage was written but I don't see it in Add/Remove. I am running Windows 7 Ultimate 64 Bit. All I see in Add/Remove is Microsoft .Net Framework 1.1 and Microsoft .Net Framework 4 Client Profile. I tried to install .Net Framework 3.5 but it never loads, my guess is it has been replaced by 4 possibly. I ran the registry tool which unregisters fine but then I get an error when I use the Register tool:
Type library exporter warning processing 'BosonNetsimInterop.ProcessControl+_ProcessControl.StartProcess(windowStyle), BosonNetsimInterop'. Warning: Non COM visible value type 'System.Diagnostics.ProcessWindowStyle' is being referenced either from the type currently being exported or from one of its base types.
Assembly exported to 'C:\Program Files (x86)\Boson Software\Boson Practice Tests\NetsimXv7\BosonNetsimInterop.tlb', and the type library was registered successfully
I uninstalled Exsim and re-installed it to no avail. Anything else I can try?