Checking cpin file and/or cein file. We are going to find DELTAGREF for a pH titratable residue without using Replica Exchange. The solvent pH value is 9.600 and was loaded from the mdin file (cp_ph.in). The temperature is 300.00 K and was loaded from the mdin file (cp_ph.in). According to the mdin file (cp_ph.in), the value of ntcnstph is 500. According to the mdin file (cp_ph.in), the value of nstlim is 10000000. The range of values for DELTAGREF is 0.000000 to 500.000000 kcal/mol (given on the argument -dgrefrange) AMBER execution #1: running 5000 MD steps for DELTAGREF = 0.000000 kcal/mol ERROR: The execution of AMBER using the binary /home/srabani/Downloads/amber24/bin/pmemd.cuda failed. The execution returned the following STDERR: b' 0\n' The command executed was: /home/srabani/Downloads/amber24/bin/pmemd.cuda -AllowSmallBox -O -i cp_ph.in.temporary -p tyr.prmtop -c nvt.ncrst -x prod.nc -inf mdinfo -o prod.log -r prod.ncrst -cpin tyr.cpin.temporary -cpout prod.cpout -cprestrt prod.cpin Check the mdout file (prod.log) to see what the error might be. Also check if all libraries necessary to run AMBER are properly set. The execution of finddgref.py stopped