EXT_GR1_INQUIRE_OPENED  1
EXT_GR1_IOCLOSE  1
EXT_GR1_IOEXIT  1
EXT_GR1_IOINIT  1
EXT_GR1_OPEN_FOR_WRITE_BEGIN  1
EXT_GR1_OPEN_FOR_WRITE_COMMIT  1
EXT_GR1_WRITE_FIELD  1