EquiSim's Formula View uses the MicroSoft VBScript engine. This is a free
component provided by MicroSoft. There's a good chance that it is already
installed on your computer.
If the Formula View does not work when you try to use it you probably need to
install the VB Script engine. You can use the installers (links below) to
do so. Just download the appropriate one for your computer and run it.
Download
the MicroSoft Script Engine for Windows 2000/XP
Download
the MicroSoft Script Engine for Windows 95, 98, NT