Sorry, I was referring to the Process Cube window ("Process Progress") that I believe is generated no matter how you attempt to process. Bottom part is all gray, shows status which is probably Process Failed for you right now.

The "top" shows the objects and their status, you are wanting to poke around up there wherever you find those dreaded red Xs.

As you traverse you may find "Operation canceled; HY0008" which is standard on a failure and not the least bit helpful. keep digging!

Eventually you will find a real, actionable error, something like "attribute key cannot be found" or "no logon servers available". It's a big pain for all the dims and facts to look like they failed, but it is generally one failure and the others are prevented from attempting.

In the lucky case where it's Attribute Key Cannot Be Found, the query is Right There, you can copy it and run it yourself.

One thing to watch for is to process your dimensions first. Process Full is supposed to do those first, but when I'm in the weeds it is almost always helpful to blow through every dimension first so that I known that an unfound attribute key error should NOT happen.