We're working on a new build of the integration module, but in the meantime here's a description of the problem and temporary workaround.
Problem: There is a compatibility issue with Orion NPM 9.0 SP2 (SP1 works fine) and the NCM integration module. This causes Orion NPM node management to fail after NCM integration module install.
Workaround:
1. Download the SolarWinds.Common.dll file (from SP2):
ftp.solarwinds.net/.../5.0-SolarWinds.Common.zip
2. Using the file above, copy (overwrite) the SolarWinds.Common.dll file in the \Inetpub\SolarWinds\bin folder on your Orion NPM server. This must be done after the NCM integration module is installed.