When using the NCSS client to open data we saved to a tempfile, we get a RuntimeError due to "Permission denied". I'm guessing Windows doesn't like someone opening the file a second time.

We could try catching the error and opening a different way, but in that case it's a much bigger pain to ensure the file gets deleted. sigh Why can't windows just behave in a unix-like fashion?

This may be obviated once we get the in-memory solution in the netcdf library, but I think it will be awhile after that before it's widely available. Might punt on this until a windows user complains...