1886719 - Error in Upgrade phase "MAIN_PROFEND/IGS_INST"

Directory:    M:\usr\sap\<SID>\SUM\abap\log
Name:         SAPup.log
-------------------------------------------------------------------------------------------
CURRENTPHASE MAIN_PROFEND/IGS_INST
...started at 20130712135912
# Using phase log file 'IGSINST.LOG'.
..finished at 20130712135916 with status ABORTED.
# Error message set: 'File '\\<HOSTNAME>\sapmnt\<SID>\SYS\exe\uc\NTAMD64'
does not exist: The network name cannot be found.
------------------------------------------------------------------------------------------


Directory:    M:\usr\sap\<SID>\SUM\abap\log
Name:        IGSINST.LOG
-------------------------------------------------------------------------------------------
1EETQ399 Last error code set is 'File
'\\<HOSTNAME>\sapmnt\<SID>\SYS\exe\uc\NTAMD64' does not exist: The
network name cannot be found. '
1EETQ204 Upgrade phase "IGS_INST" aborted with severe errors
("20130712142622")
-------------------------------------------------------------------------------------------

<HOSTNAME> is not SAPGLOBALHOST.

• High Availability System 
• Software Update Manager
• Windows Operating System

IGS, INST, IGS_INST, network, directory, exist, SAPGLOBALHOST, hostname, virtual, profile, instance, HA, High Availability, Software Update Manager;  , KBA , BC-UPG-TLS-TLA , Upgrade tools for ABAP , Problem