you have to add the extract to each solid in the geometry tree. If you want to use the keyopt on the same element, you must also put matid and not _sid (as far as I know) i.e. :

keyopt,matid,2,3 ! Simplified enhanced strain formulation

You can then check in the output of the solver that the solid185 has been used with the right keyopt, just do a Ctrl+F and search for "solid185".