HDF5 writing multiple columns when there should only be one

Hi everyone,

I’ve recently ran into an issue that I’ve never encountered before: data in my HDF5 files contain two columns of data (of the correct length) when there should be a single column. The data in the different columns is also not identical, there seems to be some systematic offset between the two values. So far this is only happening on one cluster, all other machines I have tried it on have no issues (many). I am running simulations with the GADGET (http://www.mpa-garching.mpg.de/gadget/) which has the option of outputting to an HDF5 file using the -DH5_USE_16_API compile time option. Has anyone encountered an issue like this before? Thanks!