This error indicates that Esri's ArcGIS .NET support was not installed with ArcGIS. This may have happened for a couple reasons. First, .NET Framework may not have been installed before ArcGIS. If this is the case, the ArcGIS install will not provide the option to install ArcGIS .NET support. The second reason may be that the administrator may not have selected the option to install ArcGIS .NET support while installing ArcGIS.

To correct this error, it is NOT necessary to uninstall and reinstall ArcGIS. Follow the procedures below:

1. Check the Read Me that corresponds with your current version and ensure all System Requirements are installed, including (and especially) the .NET Framework. Always review the corresponding Read Me file before installing an ArcFM Solution application.

2. Insert the ArcGIS installation CD in your drive and modify your installation to include .NET support.

3. Install all ArcFM Solution applications.