Follow-up Comment #1, bug #22032 (project relax): One possible way, it to set in lib/cr72.py The back-error from from 1e100 to 1e9, and not higher. # Loop over the time points, back calculating the R2eff values. for i in range(num_points): # The full eta+/- values. etapos = etapos_part / cpmg_frqs[i] etaneg = etaneg_part / cpmg_frqs[i] # Catch large values of etapos going into the cosh function. if etapos > 100: back_calc[i] = 1e9 continue _______________________________________________________ Reply to this item at: <http://gna.org/bugs/?22032> _______________________________________________ Message sent via/by Gna! http://gna.org/