k-Wave

1. bastlwastl
   

   Member
   Joined: Apr '14
   Posts: 7

   Hi,

   when I'm running K-Wave to prepare a h5-file for a larger c++ simulation, I get this error:

   Running k-Wave simulation...
     start time: 01-Sep-2014 17:48:25
     reference sound speed: 1496.7015m/s
     dt: 10.022ns, t_end: 50us, time steps: 4990
     input grid size: 900 by 44 by 44 grid points (45 by 13.2 by 13.2mm)
     maximum supported frequency: 14.967MHz by 2.4945MHz by 2.4945MHz
     expanding computational grid...
     computational grid size: 920 by 64 by 64 grid points
     precomputation completed in 1.5876s
     saving input files to disk...
   Error using h5create>validate_options (line 122)
   The 'ChunkSize' option must be specified if any extents are to be extendible.
   
   Error in h5create (line 67)
   options = validate_options(p.Results);
   
   Error in writeMatrix (line 170)
       h5create(filename,['/' matrix_name], [Nx, Ny, Nz], ...
   
   Error in kspaceFirstOrder_saveToDisk (line 295)
           writeMatrix(save_to_disk, eval(integer_variable_list{cast_index}),
           integer_variable_list{cast_index});
   
   Error in kspaceFirstOrder3D (line 688)
       kspaceFirstOrder_saveToDisk;
   
   Error in KWaveMasterScript_150MeV (line 46)
   kspaceFirstOrder3D(kgrid, medium, source,sensor, input_args{:});

   I tried to specify the chunk size in writeMatrix but even to smallest value of [1 1 1] resulted in an error, that this chunksize is to large. I manage to run simulations before, even with similar settings and on this machine, so this really came out of nowhere.
   What can i do?

   Another thing: i wasn't able to post anything in this forum for the last days. After i wrote another post, the form for writing a reply or a new topic didn't appear. Even from different browsers and pcs. Now my other post appeared with a day delay. So I hope these lines appears earlier ;) Anyone else encountered this problem?

   Cheers,
   Sebastian

   Posted 10 years ago #

2. Bradley Treeby
   

   Developer
   Joined: Mar '10
   Posts: 1,643

   Hi Sebastian,

   Firstly, apologies for taking so long to reply. I tried to replicate your error by creating a grid of the same size, however, it seemed to run ok. Could you post your code or tell us a bit more about your simulation, for example, the size of the source and sensor masks?

   Regarding the forum posting, we have been forced to use a more and more aggressive spam checker to keep the spam levels down. Occasionally it gets things wrong, and marks existing users as inactive. This is what happened to you a couple of weeks - please accept my apologies! I check the list periodically and noticed the error and changed it back. If it happens again, please drop me an email and I'll try and fix it asap.

   Kind regards,

   Brad.

   Posted 10 years ago #

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