LOGICAL useGCHEM
& usePTRACERS, useGCHEM, useRBCS, useOffLine, useMATRIX,
IF ( useMATRIX .AND. useGCHEM ) THEN
IF ( useGCHEM )
IF (useGCHEM)
IF ( useGCHEM ) THEN
useGCHEM =.FALSE.
& useGCHEM,
IF (useGCHEM) CALL GCHEM_CHECK( myThid )
IF (useGCHEM) CALL PACKAGES_ERROR_MSG('GCHEM',' ',myThid)
IF (useGCHEM) CALL GCHEM_INIT_FIXED(myThid)
IF (useGCHEM) THEN
IF (useGCHEM) CALL GCHEM_READPARMS( myThid )