[gmx-users] Failed to find GROMACS magic number in trr frame header

[Mijiddorj B]

Dear Justin,

Thank you very much for your reply. I see. However, I have one more
question. Is it caused by usage of -noappend or other reasons?

Best regards,

Mijiddorj

---------------------------------------------------------
>
> Message: 1
> Date: Fri, 17 Apr 2020 11:51:25 -0400
> From: Justin Lemkul <jalemkul at vt.edu>
> To: gmx-users at gromacs.org
> Subject: Re: [gmx-users] Failed to find GROMACS magic number in trr
>         frame header
> Message-ID: <77b40330-739a-c03e-85f2-1bc74b97cb65 at vt.edu>
> Content-Type: text/plain; charset=utf-8; format=flowed
>
>
>
> On 4/17/20 10:13 AM, Mijiddorj B wrote:
> > Dear GMX users,
> >
> > Hello, I performed MD simulation using gromacs 2018.7v. During this
> > simulation, the calculation was stopped because of the electric cut.
> Then,
> > I continued the simulation using "gmx mdrun with -noappend" in order to
> get
> > separate trajectory for the safety of data. After that, I would like to
> > concatenate the trr files.
> > However, I received following error message.
> >
> > How, can I concatenate these trajectories.
> > **********************************************
> > Program:     gmx trjcat, version 2018.7
> > Source file: src/gromacs/fileio/trrio.cpp (line 114)
> >
> > Fatal error:
> > Failed to find GROMACS magic number in trr frame header, so this is not a
> > trr
> > file!
> >
> > For more information and tips for troubleshooting, please check the
> GROMACS
> > website at http://www.gromacs.org/Documentation/Errors
> > ************************************************
>
> Your file is corrupted and you will have to run that portion of the
> simulation again.
>
> -Justin
>
> --
> ==================================================
>
> Justin A. Lemkul, Ph.D.
> Assistant Professor
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>
> ==================================================
>
>