Hi there,
I have updated my primary and one other additional poller to 7.3 but I have one other additional poller that presents this error when trying to upgrade "Solarwinds NCM cannot be installed on this machine due to incompatibility with one or more currently installed SolarWinds product versions"
Here is the output from PreInstaller.log
2014-06-14 22:06:14,954 [1] INFO PreInstaller.CommonHelper - Pre-Installer Started
2014-06-14 22:06:14,970 [1] INFO PreInstaller.CommonHelper - Is Core installed: True
2014-06-14 22:06:14,970 [1] INFO PreInstaller.CommonHelper - Detected Core Configuration: POLLER
2014-06-14 22:06:14,970 [1] INFO PreInstaller.CommonHelper - Core Version: 2014.1.4.0
2014-06-14 22:06:14,970 [1] INFO PreInstaller.CommonHelper - Core Install Dir: C:\Program Files (x86)\SolarWinds\Orion\
2014-06-14 22:06:14,986 [1] INFO PreInstaller.CommonHelper - Is NCM Server installed: True
2014-06-14 22:06:14,986 [1] INFO PreInstaller.CommonHelper - NCM Server Version: 7.2.12
2014-06-14 22:06:14,986 [1] INFO PreInstaller.CommonHelper - NCM Server Install Dir: C:\Program Files (x86)\SolarWinds\Orion\NCM\
2014-06-14 22:06:14,986 [1] INFO PreInstaller.CommonHelper - Is NCM Integration Module installed: False
2014-06-14 22:06:14,986 [1] INFO PreInstaller.CommonHelper - Is NPM Module installed: true
2014-06-14 22:06:14,986 [1] INFO PreInstaller.CommonHelper - NPM Module Version: 10.7.4.0
2014-06-14 22:06:14,986 [1] INFO PreInstaller.CommonHelper - Initiating Commercial Workflow
2014-06-14 22:06:15,001 [1] INFO PreInstaller.CommonHelper - Workflow Started
2014-06-14 22:06:15,344 [1] INFO PreInstaller.CommonHelper - Executed step CorePresent in workflow.
2014-06-14 22:06:15,344 [1] INFO PreInstaller.CommonHelper - Executed step CoreConfiguration in workflow.
2014-06-14 22:06:15,344 [1] INFO PreInstaller.CommonHelper - NotSupported: Displaying Not Supported Configuration error dialog
2014-06-14 22:07:09,382 [1] INFO PreInstaller.CommonHelper - NotSupported: Set return Code to 1 - error
2014-06-14 22:07:09,382 [1] INFO PreInstaller.CommonHelper - Executed step NotSupported in workflow.
2014-06-14 22:07:09,382 [1] INFO PreInstaller.CommonHelper - Workflow complete. ReturnCode: 1