deuar GMXers, my system doesn't work when i do energy minim. with cg after doing it using steep. The following message are showing: "processing coordinates... double-checking input for internal consistency... ERROR: can not do Conjugate Gradients with constraints (201522)" I set in my .mdp not use constraints (constrainsts= none) and my water model is SPC216. Can anyone help me? Regards, Samuel Pita. No iBest, suas horas navegadas valem pontos que podem ser trocados por prêmios. Sem sorteio! Inscreva-se já! www.navegueeganhe.com.br