http://www.k-wave.org/forum/topic/h5-output-file-larger-than-expected-error-cannot-write-into-dataset Support for the k-Wave MATLAB toolbox en-US Wed, 13 May 2026 00:20:39 +0000 http://bbpress.org/?v=1.0.2 q http://www.k-wave.org/forum/search.php http://www.k-wave.org/forum/topic/h5-output-file-larger-than-expected-error-cannot-write-into-dataset#post-8405 Tue, 04 Jan 2022 20:16:11 +0000 Bradley Treeby 8405@http://www.k-wave.org/forum/ <p>If you’re using the c++ code, you need to pass the record start time index to the binary using the command line flag -s (it’s not currently stored in the input file, although will be in future versions). </p> http://www.k-wave.org/forum/topic/h5-output-file-larger-than-expected-error-cannot-write-into-dataset#post-8404 Tue, 04 Jan 2022 16:50:10 +0000 benhatton 8404@http://www.k-wave.org/forum/ <p>I have a simulation of size 256 x 243 x 256, with 3506 time steps. I have included the line</p> <p><code>sensor.record_start_index = kgrid.Nt - periodSteps + 1;</code></p> <p>so that it only records the last period, corresponding to the last 29 time steps in my case. I wish to record p and p_max and use the former as an input for a thermal simulation.</p> <p>My terminal input is</p> <p><code>./k-Wave/binaries/kspaceFirstOrder-OMP -i before.h5 -o after.h5 --p_max_all -p</code></p> <p>however I receive <code>Error: Cannot write into dataset .: iostream error</code>, along with an incomplete .h5 file at over 11GB. I am on a machine with limited allotted space, but I expected my p output file to be size 256 x 243 x 256 x 29 = 461.8 MB, and the p_max_all to be significantly smaller.</p> <p>Can you suggest what might be wrong here? Thanks for your help. </p>