DEM files not compatible

[aude]

Hi,
I have downloaded DEM files from USGS. I can load them as a data source, they appear in the field selector as "elevation" but when I click "create the display" I have the error message: "not compatible with "dem" data family".

Any suggestion?

Thank you.

[tomw]

Would you please let us know the URL of the file you are having problems with? Thanks.