Client Library Desires to Push an Error on the HDF5 Error Stack:

• Client library has registered an error class ID and error information with HDF5 error API.

1. Client library uses major and minor error codes received earlier to push an error onto the HDF5 error stack.

1. The changes to the H5Epush are to pass the major and minor error codes as IDs instead of H5E_major_t and H5E_minor_t, and an error stack object handle onto which the error is pushed. An extra optional message can also be passed in as description.
2. A new API function H5Epop is added to the library. It deletes an error message from the error stack, which is specified by index.
3. A new API function H5Eerror_num is added the library. It returns the number of the error messages in an error stack.

1. Push Error