In installation guide, it claims following patches are required by NetWorker on HPUX 11v3:
PHKL_36312 or later
PHKL_41474 or later
I could not find those on my HPUX based storage nodes, but this is because first one is oldish and they both have been supressed by PHKL_42060. EMC documentation team may wish to update docs for future reference.