Hi Allen, everyone, As I understand it, you implement exactly what I suggest in my previous message - your stack walking function "walk_error_callback" stores the error numbers in a structure, which get turned into strings later. You don't actually call H5Eget_msg inside the walk callback, but rather after traversal is complete in "h5libraryError".
To clarify, it looks like calling H5Eget_msg *inside *the walk callback corrupts the stack, but to my knowledge this is not documented anywhere and is somewhat confusing behaviour. Perhaps H5Eget_msg could be changed to have different error-handling behaviour, or the documentation should be updated to explicitly point out it should not be used inside a stack traversal. More generally, would it be correct to say that the walk callback should call *no *HDF5 function during traversal to ensure the problem does not arise? Cheers, Martijn On 25 March 2014 03:02, Allen Byrne <[email protected]> wrote: > We have used the H5E functions successfully in the hdf-java native library. > Also our java unit tests for the H5E functions could be useful. > > Attached is the source for error handling in java. > > Allen > > On Monday, March 24, 2014 11:03:31 AM Андрей Парамонов wrote: > > 24.03.2014 11:00, Martijn Jasperse пишет: > > > Hi all, > > > > > > From my experience, you cannot call H5Eget_msg while traversing the > > > > > > error stack as (I think) this causes the stack to be reset. This > > > invalidates the current traversal and produces rubbish data after that > > > point. I have seen exactly the same behaviour in C with > > > including/excluding the H5Eget_msg call - my work-around is to record > > > the major/minor numbers for look-up after the stack traversal is > > > complete. This is somewhat undesirable and it seems unintuitive that > > > H5Eget_msg should fail in such a way. > > > > Thank you for your feedback. > > I propose that at least > > http://www.hdfgroup.org/HDF5/doc/H5.user/Errors.html is fixed/updated > > then, because now it somewhat misleading. > > > > Best wishes, > > Andrey Paramonov >
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