Symbol	Description	Uses
UCASE		6
UPDATE_CG2D	Update 2d conjugate grad. for Free-Surf.	4
UPDATE_CHEMISTRY_EXPORTS		2
UPDATE_EARTH_EXPORTS		2
UPDATE_ETAH		2
UPDATE_ETAWS		3
UPDATE_MASKS_ETC		2
UPDATE_OCEAN_EXPORTS		4
UPDATE_R_STAR	Update the level thickness fraction.	4
UPDATE_SIGMA		3
UPDATE_SURF_DR	Update the surface-level thickness fraction.	4