[qopen] error on MacOS with multiprocessing / data load

[Tom Eulenfeld]

Hi Manuel,

let's move the conversation to the mailing list as other people might be 
interested, too.

The work-around confirms that the
__THE_PROCESS_HAS_FORKED_AND_YOU_CANNOT_USE_THIS_COREFOUNDATION_FUNTIONALITY___YOU_MUST_EXEC__()
error on MacOS has to do with multiprocessing. Still it's a bit 
disappointing to use only one core if more are available. After some 
googling I found out, that it is probably also related to the maxosx 
backend of matplotlib which does not allow to plot in several subprocesses.
Can you please try another backend by starting Qopen with

python -c "import matplotlib as mpl; import qopen; mpl.use('agg'); 
qopen.core.run_cmdline()"


It should be possible to use SAC files, but additionally you'll need 
Event and Station XML files. If you need further assistance, let me know.

Cheers,
Tom



On 02.05.2018 13:56, Jaimes Caballero, Manuel Alejandro wrote:
> Dr. Eulenfeld,
> 
> Thanks for your quick reply!, the program seems to work like that and it 
> takes less than 5 minutes. I'm wondering if it'd be possible to use .SAC 
> files as the input files, or would I need a .xml file for stations and 
> events?, I could not find anything regarding that on seistools, I found 
> that there was a similar procedure for the program yam but I do not know 
> if it applies the same to qopen?
> 
> Thanks a lot,
> 
> Manuel Jaimes.
> 
> On Wed, May 2, 2018 at 6:02 AM, Tom Eulenfeld <tom.eulenfeld at uni-jena.de 
> <mailto:tom.eulenfeld at uni-jena.de>> wrote:
> 
>     In the meantime you can try
> 
>     qopen --njobs 1
> 
>     which does not use the multiprocessing module.
> 
>     Cheers,
>     Tom
> 
> 
> 
>     On 02.05.2018 10:25, Tom Eulenfeld wrote:
> 
>         Hi Manuel,
> 
>         no, I've never encountered this issue before.
> 
>         Do you mind opening a new ticket on github?
>         https://github.com/trichter/qopen/issues
>         <https://github.com/trichter/qopen/issues>
> 
>         Cheers!
>         Tom
> 
> 
>         On 01.05.2018 17:19, Jaimes Caballero, Manuel Alejandro wrote:
> 
>             Hi Dr. Eulenfeld,
> 
>             I have been trying to use your software qopen, the
>             installation process and everything until qopen --tutorial
>             works perfectly, when I try to run qopen in the terminal it
>             gives an error which says: Break on
>             __THE_PROCESS_HAS_FORKED_AND_YOU_CANNOT_USE_THIS_COREFOUNDATION_FUNTIONALITY___YOU_MUST_EXEC__()
>             to debug.
> 
>             Have you encountered this issue before or do you know what
>             might be the cause? I'm using macOS.
> 
>             Thanks for your time.
> 
>             Manuel Jaimes.
> 
>