Regarding SPS5 revision 56 update from revision 55

Hi,

I am trying to update Revision SPS5 Revision56 from SPS5 Revision 55.

I am trying to upgrade HANA DB using ./hdbupd , but i get below Upgrade failed error

Upgrade failed

    Checking system requirements failed

      Performing HANA platform check script failed

        Performing python script failed

          Starting external program /usr/bin/python

            Command line is: /usr/bin/python /apps/export/software/SAP_HANA_DATABASE/server/HanaHwCheck.py

            Output line 1:

            Output line 2: performing Hardware check......

            Output line 3:

            Output line 4: System Manufacturer            Cisco Systems Inc         OK       

            Output line 5: System Product Name            UCSC-BASE-M2-C460         OK       

            Output line 6: CPU Model                      4870                      OK       

            Output line 7: OS                             SLES 11 SP 1              OK       

            Output line 8: Memory Total                   491520 MB                 not enough memory or wrong memory configuration!

            Output line 9: Memory Total                   491520 MB                 OK       

            Output line 10: Core count                     40                        OK       

            Output line 11: Hyper-threading                Activated                 OK       

            Output line 12: Numa functionality             Activated                 OK       

            Output line 13:

            Output line 14: Hardware check failed!!

            Output line 15:

            Program terminated with exit code 255

Anybody got idea on this.

Thanks

Regards

Ravindar