Proteus seems to have a dependency on Jess, the Rete engine from Sandia Lab. As far as my knowledge goes, which is outdated, Jess is not FOSS, may be free for academics. If I am not mistaken, you can still release Proteus as FOSS without Jess.
balu raman, msee., ccp ryder brook pediatrics morrisville, vt 05661, usa --------------------------------- Never miss a thing. Make Yahoo your homepage. [Non-text portions of this message have been removed]