[gmx-users] Problems with large molecule simulation

Tam, Benjamin benjamin.tam.14 at ucl.ac.uk
Tue May 16 19:32:51 CEST 2017

Hi Justin,

Thank you for replying, the problem is this:

Fatal error:
Atomtype Zr110418 not found
For more information and tips for troubleshooting, please check the GROMACS
website at http://www.gromacs.org/Documentation/Errors

because the number and the name combine together i.e. supposed to be Zr1 10418. How can I solve this problem?

Best regards,


-----Original Message-----
From: gromacs.org_gmx-users-bounces at maillist.sys.kth.se [mailto:gromacs.org_gmx-users-bounces at maillist.sys.kth.se] On Behalf Of Justin Lemkul
Sent: 16 May 2017 18:30
To: gmx-users at gromacs.org
Subject: Re: [gmx-users] Problems with large molecule simulation

On 5/16/17 1:27 PM, Ben Tam wrote:
> Dear gromacs user,
> I am trying to simulate a large system, but I ran into some fundamental problems. For example in the .gro file, the name of the atoms merge with the number count:
>     2MOL     C2 9998   3.987   2.259   6.276
>     2MOL     C5 9999   3.987   2.061   6.079
>     2MOL     C110000   3.987   1.025   7.721
>     2MOL     C210001   3.987   0.920   7.615
> Sorry for this basic question, but how do people solve that problem? As I know there is a specific format for .gro file?

Yes, it is fixed-format.


What exactly is the nature of the problem?  Most common systems are >10k atoms and all GROMACS tools should handle things just fine.



Justin A. Lemkul, Ph.D.
Ruth L. Kirschstein NRSA Postdoctoral Fellow

Department of Pharmaceutical Sciences
School of Pharmacy
Health Sciences Facility II, Room 629
University of Maryland, Baltimore
20 Penn St.
Baltimore, MD 21201

jalemkul at outerbanks.umaryland.edu | (410) 706-7441 http://mackerell.umaryland.edu/~jalemkul

Gromacs Users mailing list

* Please search the archive at http://www.gromacs.org/Support/Mailing_Lists/GMX-Users_List before posting!

* Can't post? Read http://www.gromacs.org/Support/Mailing_Lists

* For (un)subscribe requests visit
https://maillist.sys.kth.se/mailman/listinfo/gromacs.org_gmx-users or send a mail to gmx-users-request at gromacs.org.

More information about the gromacs.org_gmx-users mailing list