Hi, This is in reference to CP in Quantum-Espresso 3.0. What exactly is nr1b, nr2b, nr3b? Are they at all related to ecutwfc or ecutrho? Thanks, -- Nichols A. Romero, Ph.D. 1613 Denise Dr. Apt. D Forest Hill, MD 21050 443-567-8328 (C) 410-306-0709 (O)