Walk error stack
H5E.walk(direction,func) walks the error stack for the current thread and calls the specified function for each error along the way. func is a function handle. direction specifies how the error stack is traversed and can be given by one of the following strings or the numeric equivalent.
The specified function must have the following signature:
status = func(n,error_struct)
where n is the indexed position of the error in the stack and error_struct is a structure with the following fields:
|maj_num||Major error number|
|min_num||Minor error number|
|func_name||Function in which the error occurred|
|file_name||File in which the error occurred|
|line||Line in file where error occurs|
|desc||Optional supplied description|
This function corresponds to the H5Ewalk1 function in the HDF5 library C API.