Rhino has recently started to support DotNET plugins. Since Rhino4 this implementation is very complete and robust, however some problems remain. This page treats the known issues and possible solutions.
DotNET plugins failed to load on Windows versions with certain language packs (such as Turkish). A fix for this issue is available for Rhino4 SR1.
If a DotNET plugin is not located on the local hard drive (I.e. if it is loaded over a network) it will not load. A fix for this issue is available for Rhino4 SR1.
If you're still running into problems, you can enable a hidden command in Rhino which creates a report on the loading process:
Please send us the contents of your command history window.