AMBER Archive (2008)Subject: AMBER: problems with restart of MD
From: Vijay Singh (vijayratan.singh_at_gmail.com)
Date: Fri Jan 11 2008  11:29:31 CST
Hi,
Not sure if my messages are reaching the right destination. I did not get
any response on 2 different occasions earlier. Neverthless, another try.
I am using amber9 and doing some very basic MD.I am having some trouble with
the restart of MD production run. Not sure where I am going wrong. After
initial minimization, the first part of run is fine
The input files looks 
&cntrl
imin = 0, ntb = 0, irest = 0,
igb = 1, ntpr = 10000, ntwx = 1000,
ntt = 3, gamma_ln = 1.0,
temp0 = 800.0,tempi = 800.0,
nstlim = 40000000, dt = 0.001,
cut = 999
/
mpiexec $AMBERHOME/exe/sander.MPI O i md_800k_1.in o md800_1.out c
t57c_min.rst p t57c.prmtop r mdout800_1.rst x mdout800_1.mdcrd
Till this point I get all the output as needed. But the 2nd step below is
where I get stuck on the restart part, the input is as follows 
&cntrl
imin = 0, ntb = 0, irest = 1, ntx = 7,
igb = 1, ntpr = 10000, ntwx = 1000,
ntt = 3, gamma_ln = 1.0,
temp0 = 800.0,
nstlim =40000000, dt = 0.001,
cut = 999
/
#mpiexec $AMBERHOME/exe/sander.MPI O i md_800k_2.in o md800_2.out c
mdout800_1.rst p t57c.prmtop r mdout800_2.rst x mdout800_2.mdcrd
From here I don't get any output. The mdout file stops with 
Langevin dynamics temperature regulation:
ig = 71277
temp0 = 800.00000, tempi = 0.00000, gamma_ln= 1.00000
 INFO: Old style inpcrd file read


3. ATOMIC COORDINATES AND VELOCITIES


Could someone please help me on that.
Regards
Vijay

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