Installation problems under Vista
Several people have reported problems loading the software on PCs running Vista. The publisher is currently working on a fix for this.

One way to install the software in this case is to make sure that you have administrator privileges. Then right click on the installer, go to properties, and have Vista install the software in "XP mode."

Another solution is to use a PC that is running XP and install the software onto a memory stick. Then use the memory stick to transfer the folder onto the PC running Vista.

Both of these solutions have worked for others in the past.

HPGSolver
The value of dy/dt that is displayed when you move the pointer around in the ty-plane is not correct. It does not depend on t.