When I try to install ET GeoWizards 10.0 on ArcGIS 9.3.1 I get the following error: "Unable to get installer types in C:\Program Files\..\ETGeoWizards.dll assembly -> Unable to load one or more of the requested types. Retrieve the Loader Exceptions properly for more information."
Most probably the .NET support for ArcGIS is not installed or installed incorrectly. To correct this:
- Start the ArcGIS installation (from a DVD or a backup location)
- Select Modify and click Next
- Click on .NET Support and select "Will be installed on local hard drive"
- Finish the installation
- Run the setup of ET GeoWizards, ET GeoTools or ET Surface again