Why do materialized views show a red X (invalid) in Mat. View mode (only) on the left and as INVALID when referenced in the Used By tab on the right? Both the Object and Accessing views appear perfectly fine and return the data correctly. This seems fairly consistent and is not resolved with nightly refreshes. I'm getting to the point where I think this is safe to ignore, but I thought I'd ask before I officially Don't Care. Thanks for any wisdom ... (and Happy Holidays.)
Dave