Extraction Problem with divaEXT.rul

[dati_remo@libero.it]

This is the layout of the transistor that I must recognize:

_______________________
| ___________________ |
| | _ | |
| | ___ | | ___ | |
| | | |__|_|__| | | |
| | | D __|_|__ S | | |<-----nplus
| | |___| | | |___| | |
| | |_| ^ |<|------adlvtn
| |_________^_____|___| |
|___________|_____|_____|
| |
| active
poly

Where is the error in the divaEXT.rul file?


-----

(adlvtn = (geomOr "adlvtn"))
(nplus = (geomOr "nplus"))
(active = (geomOr "active"))

(sub_1 = (geomAnd adlvtn nplus))
(sub_SD = (geomAnd sub_1 active))
(sub_SD_2 = (geomAnd sub_SD poly))
(sub_SD_3 = (geomAndNot sub_SD sub_SD_2))
(sub_1_2 = (geomAndNot sub_1 nwell))

---

(extractDevice ngate
(poly "G")
(sub_SD_3 "S" "D")
(sub_1_2 "B")
"nfet ivpcell"
)