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Updated October 26, 2016
This article addresses the issue where an additional polling engine cannot proceed in upgrading to NPM 12.0.1 poller as the VNQM module is found incompatible.
NPM 12.0 and later
VNQM 4.2.3 and later
The additional poller is running NPM 12.0 with VNQM 4.2.3. Updating the poller to NPM 12.0.1 will not proceed as it detected the VNQM 4.2.3 as an incompatible module. You also cannot update the VNQM to 4.2.4 because that version requires NPM 12.0.1.
Running the NPM 12.0.1 Additional Polling Engine installer shows the message below:
On the additional poller, uninstall VNQM 4.2.3 via Windows Control Panel > Add/Remove Programs.
Once uninstalled, cancel the Configuration Wizard.
Open Windows Registry. Start > Run > Regedit.
Navigate to this directory: HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Solarwinds\Orion.
Right click the VoIP Monitor folder and select Delete.
Note: You can also create a backup of this registry through export - Right click > Export.
Once deleted, run the NPM 12.0.1 additional polling engine installer. This should proceed on installing the NPM 12.0.1 without any issues.
Once NPM 12.0.1 additional poller is updated, proceed on installing VNQM 4.2.4 poller.