RE: Problems to parametrize molecules

From: Bennion, Brian (bennion1_at_llnl.gov)
Date: Tue Apr 14 2015 - 15:45:41 CDT

I am just guessing here...

You need to pay attention to the what the error states. The errors suggest that the same atom is bonded to itself and it obviously cant find that in the parameter file.

________________________________
From: owner-namd-l_at_ks.uiuc.edu [owner-namd-l_at_ks.uiuc.edu] on behalf of Evandro Semighini [epsemighini_at_gmail.com]
Sent: Tuesday, April 14, 2015 1:30 PM
To: namd-l_at_ks.uiuc.edu
Subject: namd-l: Problems to parametrize molecules

Hello NAMD community

I am trying to run NAMD with the results of virtual screening assays I made, but I am not being able to parametrize the molecules properly.

I read everything I found about it but, unfortunately, it didn't worked.
I tried charmmgui and paramchem webservers to generate the psf files, but when I try to run NAMD, theres always some unknown atom type (this errors are from two different molecules)

FATAL ERROR: UNABLE TO FIND BOND PARAMETERS FOR CG301 CG301 (ATOMS 22 22)

FATAL ERROR: UNABLE TO FIND BOND PARAMETERS FOR NG2S1 NG2S1 (ATOMS 8 8)

This atom types are at the par_all36_cgenff.prm and I added all the parameter files from the package to run this simulations.
There were no high penalties for the atoms from the servers.

Can you please help me to find where I am missing or show me where I should go to parametrize this molecules for the simulations ?

Thank you,

Evandro Semighini
University of São Paulo - Brazil

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