Installation guide

146 EMC NetWorker Release 8.1 SP1 Installation Guide
Downgrade to a Previous Release
For Windows only, remove the librpcomp.dll registry entry
This section only applies to a Windows host where the NetWorker 8.1 DA version is
currently installed, or was installed prior to upgrading to NetWorker 8.1 GA.
For example, the following downgrade scenarios require that you remove the librcomp.dll
registry entry on Windows NetWorker server:
◆ Downgrading an 8.1 (DA version) NetWorker server.
◆ Downgrading an 8.1 (GA version) NetWorker server that was previously running the DA
version of the 8.1 software.
To remove the librcomp.dll registry entry:
1. Start the regedt32.exe program
2. Navigate to the following registry setting:
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVe
rsion\SharedDLLs
3. Delete the following key:
C:\Program Files\EMC NetWorker\nsr\bin\librpcomp.dll

If you do not remove the registry key after you install the previous version of the NetWorker
software, the nsrsnmd process fails to start and the following error message appears in
the daemon.raw file:
Unable to send the version information: Daemon versions for 'nsrsnmd version' and
'nsrmmd version' are not updated in NSRLA.
Deleting the NetWorker tmp directory
The location of the NetWorker tmp directory differs for Windows and UNIX:
◆ On Windows: C:\Program Files\Legato\nsr\tmp or C:\Program Files\EMC
NetWorker\nsr\tmp
◆ On UNIX: /nsr/tmp
Restoring pre-NetWorker 8.1 resources files
During the update, the NetWorker server update created a backup copy of the
pre-NetWorker 8.1 resource files. Restore the pre-NetWorker 8.1 resource files:
1. Rename the current resource database directories.
For example:
• On UNIX, type:
mv /nsr/res/nsrdb /nsr/res/nsrdb.old
mv /nsr/res/nsrladb /nsr/res/nsrladb.old