Solution : https://service.sap.com/sap/support/notes/837670 (SAP Service marketplace login required)
Summary : 
      This SAP Note identifies the required OS patches for installing and running SAP systems on HP-UX platforms. For HP-UX 11.31 (version 3), certain feature enablement and hardware enablement patches from March 2012 among others are mandatory. Similar recommendations exist for HP-UX 11.23 and HP-UX 11.11 across different databases like Oracle, Sybase ASE, DB2, and MaxDB. Installation of the latest patches, as suggested by HP, remains a general recommendation to ensure optimal system performance. Specific patch numbers, as well as additional minimum patch requirements, are provided for different SAP kernel releases and HP-UX versions to guide installation and updates.
Key words : 
20 kernel sap products running kernel release 640sap products running kernel release 46d_extthese, sap products running kernel release 640_ex2sap products running kernel release 46d_ex2these, sap systems running downward compatible kernel release 721, 20 kernel sap products running kernel release 710, 353a hardware enablement patchesr hp-ux 11i v3, sap systems running kernel release 720_ext, sap products running kernel release 700, 353a feature enablement patches  hp-ux 11i v3, december 2008additional minimum os patch requirements, december 2006additional minimum os patch requirements
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