Looks like you are running into a known issue - CSCeg60853.
Here is the release-note, try the workaround in here. If this doesn't work, you should escalate to TAC and reference this defect number so they can get you a software fix.
Symptom:
Running Unity 4.0.4 SR1 installation wizard fails with a generic message to
look in the :\CommServer\logs folder.
E:\views\bldr7_unitybld_ssview\un_Tools\HotFix\SRWizard\src\WizUpdate.cpp 482
2004-12-16 08:59:39 Information MiuSipLineSvr.dll
E:\views\bldr7_unitybld_ssview\un_Tools\HotFix\SRWizard\src\WizUpdate.cpp 186
2004-12-16 08:59:39 Error The above file could not be opened for read access.
E:\views\bldr7_unitybld_ssview\un_Tools\HotFix\SRWizard\src\WizUpdate.cpp 187
2004-12-16 08:59:39 Information Try applying the Service Release while Cisco
software is not running.
E:\views\bldr7_unitybld_ssview\un_Tools\HotFix\SRWizard\src\WizUpdate.cpp 188
2004-12-16 08:59:39 Error The update worker thread returned exit code: -1
E:\views\bldr7_unitybld_ssview\un_Tools\HotFix\SRWizard\src\WizUpdate.cpp 115
2004-12-16 09:00:55 Error Could not update your Cisco Unity server. Review the
log file: d:\CommServer\logs
Workaround:
At some sites, altering the Windows PATH environment variable has worked
around the issue. For instance, if the PATH appears as...
%systemroot%\system32;%systemroot%;%systemroot%\system32\wbem;c:\program
files\microsoft sql server\80\tools\binn;%systemroot%
\lhsp;d:\commserver\cscoserv\java2sdk\bin;d:\commserver\cscoserv\tomcat\bin;d:\
lotus\notes;C:\Program Files\Symantec\pcAnywhere\;D:\Lotus\Notes;%SystemRoot%
\LHSP;d:\CommServer\cscoserv\Java2SDK\bin;d:\CommServer\Components;d:\Co
mmServe
r\cscoserv\Tomcat\bin
...change the PATH so that the "\CommServer\Components" portion is at the end
of the statement. For instance...
%systemroot%\system32;%systemroot%;%systemroot%\system32\wbem;c:\program
files\microsoft sql server\80\tools\binn;%systemroot%
\lhsp;d:\commserver\cscoserv\java2sdk\bin;d:\commserver\cscoserv\tomcat\bin;d:\
lotus\notes;C:\Program Files\Symantec\pcAnywhere\;D:\Lotus\Notes;%SystemRoot%
\LHSP;d:\CommServer\cscoserv\Java2SDK\bin;d:\CommServer\cscoserv\Tomcat\bin;d:\
CommServer\Components;
To get to the path statement:
Right Click My computer | Properties | Advanced | Environment Variables | Under
system variables find Path and select it | Click on Edit and move the
:\CommServer\Components from the middle of the path to the end | Click
on OK.
