Trying to upgrade Portal from NW 7.0 to NW 7.3.

SUM Versions used:  1.0     

Error messages:

1. Could not deserialize the value of type StringTable. Syntax error on elemen/attribute: ColumnName expected. See screenshot First_error.png. Further analysis showed this as possible source: See First_error_source.png
   1. First_error.png

First_error_source.png

1. When I repeated, SUM continued and triggered second error during BIND_SUPPORT_PACKAGES phase: Usage 'sap.com/AS' cannot be found in the mapping. And before displaying this error, it displayed: (UsageMapping.xml not found)

Dec 23, 2012 4:06:41 PM [Info]:        com.sap.sdt.j2ee.tools.appl.ApplPackFile

          Loader.loadUsageMapping(ApplPackFileLoader.java:365) [Thread[main,5,main]]: Mapp

          ing file /usr/sap/EPA/SUM/java/config/UsageMapping.xml not found, will return em

          pty map.

Documents Reviewed:

1. wiki.sdn.sap.com/wiki/display/ERP6/SAP+Netweaver+7.3x+hub+systems+upgrade
2. Notes reviewed:   

• Note 1707161 - Central Note - Software Update Manager 1.0 SP06 [lmt_007]
• 1766130 - No UTL Description for active source product {sap.com/ERP=, sap.com/SRM=}!
• Note 1111316 - Deployment failed because of missing manifest attributes
• Note 1468349 - SAP Business Suite 7 for SAP NetWeaver 7.3 hub systems
• Note 1532805 - Add-On Compatibility of SAP NetWeaver 7.3
• Note 1602543 - Error during BIND_SUPPORT_PACKAGES for MDM_JAVA_API
• Note 1656036 - SUM functionality for checking sapstartsrv patch level
• Note 1659363 - SolMan 7.1 upgrade fails during the PREPARE_JSPM_QUEUE phase

Solution Manager Configuration: See attachment for LVSM output:

Solution Manager configuration for the LVSM output:

1. PoRTAL ADD-ON SAP NW 7.0 EHP1
2. SAP EHP1 FOR SAP NETWEAVER 7.0
3. SAP SRM 7.0 / NW7.01

When I tried to add SAP ERP 6.0, it produced an inconsistency and also LVSM showed warning; however 3 products as shown above displays no error.

I've tried several options with no luck. I also tried to download stack.xml more than once with different configurations ending up with the same error message.

Does anyone know possible reason for this situation?

Thank you,

Bala