Currently the most exceptions that we're getting from our system is when a request is made on a dataset's non-HTML views.

For example we get a lot of requests to:

/dataset/org.nsf.aon.cadis.Hydrology_and_Terrestrial_Cryosphere.Permafrost_Observatories.Network_of_Permafrost_Observatories_in_North_America_and_Russia/files.wget

These requests are generally called by google or some other bot. It would be nice if we returned a 404 page instead of a 500 error page.

We will need error views for all the following extensions:

.wget
.dml
.dif
.iso19139