Gammitin (Ben) 💾 (npub1zr4…5p7x) Which drivers are you trying to use? The latest SNAP driver has support for the G400, although not for a dual head setup. (It only supports the G450 or G550 for dual monitor using Matrox cards).
Also make sure you meet the minimum requirements for FixPaks installed first. Warp 4, at least fixpak 5 or better; Warp 3, at least fixpak 35.
ecsoft2.org/scitech-snap-graph…