[AMBER] Using TCPB with Terachem in Amber

From: Abdelrahman, Noureen via AMBER <amber.ambermd.org>
Date: Fri, 31 May 2024 19:34:25 +0000

Dear all,

I am trying to run TCPB with Terachem in Amber. I extracted one frame from the Amber MD simulation to use as test. I carried out my MD simulation in explicit solvent using the OPC water model. When I run my TCPB calculation, the calculation stops abruptly and I get the following message:
3. ATOMIC COORDINATES AND VELOCITIES
--------------------------------------------------------------------------------
Cpptraj Generated Restart
 begin time read from input coords = 0.000 ps
 Number of triangulated 3-point waters found: 5000
--------------------------------------------------------------------------------
Attached below is my input file:
Protein QM/MM HF/STO-3G/ff19SB NVE 20 steps (dt=0.5fs, no shake)
 &cntrl
 imin = 0, !no minimization
 irest = 0, !restart
 ntx = 1, !coordinates and velocities are read in
 cut = 9999.9 !non-bonded interactions cutoff
 dt = 0.0005, !0.5fs time step
 ntb = 0, !no periodicity and PME off!
 ntt = 0, !turn off thermostat
 ntpr = 1, !print details to log every step
 ntwx = 1, !write coordinates to mdcrd every 500 steps (every 250fs)
 ntwr = 2, !write restart file at last step
 nstlim = 20, !run for 20 steps
 nscm = 0, !No removal of COM motion,
 ioutfm = 1, !NetCDF MDCRD.
 ntxo = 1, !Formatted ASCII restart file
 ifqnt = 1,
 /
 &qmmm
 qmmask = '.2411-2489,1387-1390,908-913,1397-1411,1911-1918,1095-1106,1476-1485,1457-1466,1847-1856',
 qm_theory = 'TERACHEM',
 /
 &tc
 host = 'localhost',
 port = 12345,
 method = 'rhf',
 basis = 'sto-3g',
 debug = 2,
 /
EOF

Has anyone encountered this before?
Thanks,
Noureen
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Received on Fri May 31 2024 - 13:00:02 PDT
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