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

[Justin Lemkul]

On 4/18/20 5:38 AM, Mijiddorj B wrote:
> 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?

No, it's because of the power failure likely causing an issue on the 
filesystem or with your file directly.

-Justin

> 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
>> Office: 301 Fralin Hall
>> Lab: 303 Engel Hall
>>
>> Virginia Tech Department of Biochemistry
>> 340 West Campus Dr.
>> Blacksburg, VA 24061
>>
>> jalemkul at vt.edu | (540) 231-3129
>> http://www.thelemkullab.com
>>
>> ==================================================
>>
>>

-- 
==================================================

Justin A. Lemkul, Ph.D.
Assistant Professor
Office: 301 Fralin Hall
Lab: 303 Engel Hall

Virginia Tech Department of Biochemistry
340 West Campus Dr.
Blacksburg, VA 24061

jalemkul at vt.edu | (540) 231-3129
http://www.thelemkullab.com

==================================================