Invalid Raster Dataset when trying to load ECW

Discussion created by mikeb226 on Jul 23, 2010
Latest reply on Jul 27, 2011 by oldtimer1820
We upgraded to ArcGIS 10 yesterday.

Tried to add our ECW aerial imagery and got an error message:

"Invalid rater dataset. Failed to create raster layer."

These ECW files were opening just fine in Arc 9.3.1 two days ago.

What's the problem?

(ArcInfo license, btw...)