I don’t think these same regional domains have ever been used in other version of the model.
However, the suite of the same version (u-cf348) ran for 6 hours with two similar domains before I added STASH requests.
That was before I found a reginal domain for which land sea mask is created correctly. So I tried running that suite again now, and it’s been running for a while.
Now it’s finished for the first nest. Some of the fields in the dump file appear to be OK.
In u-cg028, um_fcst_000 fails within a minute for all of 3 nests with the same error. The difference is the STASH requests and other changes related to them.