This article outlines a problem installing IP Address Manager on an additional polling engine with the following error:
Orion Already Installed
SolarWinds Orion IP Address Manager Additional Poller Compatibility is already installed. To repair this installation, use "Add or Remove Programs" control panel.
All IPAM versions
IPAM does not make use of an additional polling engine in any way. This installer is used only in a scenario where Orion Core needs to be upgraded in an environment where IPAM stands alone without other Orion products.
Perform installations or upgrades of IPAM on the main polling engine only.