Opened "h5mkgrp_nested_mult_p.h5" with sec2 driver.
/                        Group
    Location:  1:96
    Links:     1
/one                     Group
    Location:  1:800
    Links:     1
/one/two                 Group
    Location:  1:1832
    Links:     1
/three                   Group
    Location:  1:2864
    Links:     1
/three/four              Group
    Location:  1:3568
    Links:     1
