This hotfix repairs a problem that occurs during the side-by-side installation of two different licensing products. During the installation of stand-alone licensing products with previously installed network licensing products, the following error occurs indicating that the installation failed: 1: 5 2: Failed to load FNP_ACT_Installer.dll. 3: 126
Knowledge Base document: FLEXnet Licensing Side-by-Side Hotfix
This applies to most all Autodesk 2010 products from AutoCAD 2010 to Revit Architecture 2010.