[AMBER] NPT run prior to REMD

From: Liyanage, Risi \(MU-Student\) via AMBER <"Liyanage,>
Date: Mon, 4 Mar 2024 21:36:17 +0000

Hello guys,
I am very confused about the usage of ntp=4 option in NPT ensemble equilibration runs prior to REMD. Can someone upload an example script?
I always get this error, (I have tried ChBox to set angles too)

| Flags:
 getting new box info from bottom of inpcrd
| INFO: Old style inpcrd file read

| peek_ewald_inpcrd: Box info found
ERROR: Problem reading &ewald section of MDIN
npt.in
 SANDER BOMB in subroutine read_ewald
 Cannot do non-isotropic scaling unless orthorhombic
 use ntp=1 if angles are not 90 degrees.

I think it is something wrong with my ewald namelist, but I could not find any examples.

npt equilibriation
 &cntrl
  imin = 0, ntx = 5, irest = 1,
  ntc = 2, ntf = 2,
  nstlim = 500000, dt = 0.002,
  ntpr = 1000, ntwr = 1000, ntwx = 10000,
  ntt = 3, gamma_ln = 1.0, temp0 = 300.0, ig = -1,
  ntp = 4, barostat = 1, pres0 = 1.0, taup = 1, iwrap = 1,
  cut = 10.0,
 /
 &ewald
  target_n = 100, target_a = 70.0, target_b = 70.0, target_c = 70.0,
 /

Any help would be appreciated.
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Received on Mon Mar 04 2024 - 14:00:02 PST
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