Hello !

   When I asked IBM Support prior to an  upgrade from 3.1.2.50->4.1.5.0
   The  recommended way from development people  was   to go to the latest
level of  V.3.1   (  3.1.2.50 ->  3.1.2.90 )
   Then do an upgrade straight to  V.4.1.0
   After this  to  V.4.1.4.0  (  minor changes -  because of some webadmin
image changes )
   Then finally to  V.4.1.5.0  which should be  stable.
   I tested it  successfully  in a  AIX  4.3.3 environment with  ML 9

   addtional driver  version requirements  depend on your  library , tapes
...

Mit freundlichen Gruessen - Yours sincerely

Manfred Eber
System Engineering
GE CompuNet Ludwigshafen