[Gmsh] Error due to many volumes

[Christophe Geuzaine]

Romain Quey wrote:
> Dear Gmsh developers, dear all,
> 
> Using gmsh 2.2.0 on Linux, I'm having the following error:
> 
> $ gmsh -3 n1100-id1.geo
> Info    : Parsing file 'n1100-id1.geo'
> Error   : [on processor 0] Unable to open file 'n1100-id1.msh'
> 
> My geo file contains many 'Volume' definitions (1100) -- see the 
> attached example.
> 
> Browsing the source files, I've found that this problem probably comes
> from 'Parser/Gmsh.tab.cpp':
> 

This code is unrelated to your error (you don't include any files in 
your .geo).

The message means that Gmsh could not open the output file for writing:
you might not have write pemissions in the directory, or the disk might
be full, ...?

I could mesh your geometry without problems on my laptop. (For 
repetitive geometries like this you might want to use a function to 
generate each block; and maybe generate the grid by extrusion.)

> #line 2548 "Gmsh.y"
> {
>       if(!strcmp((yyvsp[(1) - (3)].c), "Include")){
>         char tmpstring[1024];
>         FixRelativePath((yyvsp[(2) - (3)].c), tmpstring);
>         // Warning: we *don't* close included files (to allow user
>         // functions in these files). If you need to include many many
>         // files and don't have functions in the files, use "Merge"
>         // instead: some OSes limit the number of files a process can
>         // open simultaneously. The right solution would be of course
>         // to modify FunctionManager to reopen the files instead of
>         // using the FILE pointer, but hey, I'm lazy...
>         Msg(STATUS2, "Reading '%s'", tmpstring);
>         ParseFile(tmpstring, 0, 1);
>         SetBoundingBox();
>         Msg(STATUS2, "Read '%s'", tmpstring);
>       }
> 
> Could you please solve this problem?
> 
> Many thanks for your software,
> 
> Best regards,
> 
> 
> ------------------------------------------------------------------------
> 
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-- 
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science
http://www.montefiore.ulg.ac.be/~geuzaine