Comment (by Gabriele Bozzola):

The function in CarpetMask are scheduled in SetupIMask, which is a group provided by CarpetReduce.

If I look at the schedule.ccl of CarpetReduce, I see

SCHEDULE GROUP MaskBase_SetupMask AT basegrid AFTER (SpatialCoordinates SphericalSurface_Setup)

Is the correct fix to add Spherical_Surface_Set (or SphericalSurface_HasBeenSet) among the AFTER here?

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Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2625/carpetmask-should-not-be-scheduled-before