[Pw_forum] QE-5.1.2: NEB.X Crashes with MPI errors

[Mauro Sgroi]

Dear Paolo,
thanks a lot for the reply.
No CRASH file is produced. I will try to recompile reducing the
optimization level. Maybe it helps.
Best regards,
Mauro.

2015-06-16 11:42 GMT+02:00 Paolo Giannozzi <p.giannozzi at gmail.com>:

>
>
> On Mon, Jun 15, 2015 at 4:13 PM, Mauro Sgroi <
> maurofrancesco.sgroi at gmail.com> wrote:
>
>
>> Inserting the cobalt atoms neb.x crashes during the calculation on the
>> second image.
>> No error is printed in the log but in the standard output I obtain:
>>
>>           2           2 INTERMEDIATE_IMAGE
>> [t12node084:17231] 55 more processes have sent help message
>> help-mpi-btl-openib.txt / reg mem limit low
>> [t12node084:17231] Set MCA parameter "orte_base_help_aggregate" to 0 to
>> see all help / error messages
>> [t12node082:28692] *** An error occurred in MPI_Bcast
>> [t12node082:28692] *** on communicator MPI COMMUNICATOR 9 SPLIT FROM 7
>> [t12node082:28692] *** MPI_ERR_TRUNCATE: message truncated
>> [t12node082:28692] *** MPI_ERRORS_ARE_FATAL: your MPI job will now abort
>>
>
> try to see if there is a CRASH file somewhere, in particular in the output
> directory of image 2. If there is none, the code hasn't stopped in one of
> the many error checks. If there is one, the error message should explain
> something.
>
> It is very difficult to figure out from such obscure messages what went
> wrong and where. Typically this kind of obscure crashes are either due to a
> library or compiler bug, or to subtle code bugs, leading to different
> processors taking different paths (for instance: some processors find
> convergence, some don't).
>
> Paolo
> --
> Paolo Giannozzi, Dept. Chemistry&Physics&Environment,
> Univ. Udine, via delle Scienze 208, 33100 Udine, Italy
> hone +39-0432-558216, fax +39-0432-558222
>
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