model出問題了，應該怎麼修改呢？

lynker

Error found by spectre in `rnod', during circuit read-in. "/home/work/design/tsmc_modle/mm035ld12.scs" 9709: Function `v' is  undefined or is used recursively.

" b: @# o8 d, a! M; X7 S* ^subckt rnod ( n1 n2 )
4 S9 Z0 K9 I1 C* R' c5 xparameters l=1u w=1u factor=1 pt=temp rsh=80 dw=-0.059u ptc1=1.51e-3 ptc2=0 pvc1=9.78e-4 pvc2=-4.01e-5
8 S3 K' ?* E& X6 c7 s+ tfac=1.0 + ptc1 * (pt - 25.0) + ptc2 * (pt - 25.0) * (pt - 25.0)
r1 ( n1 n2 ) bsource r=rsh * l / (w - dw) * (1 + pvc1 * abs(v(n2,n1)) + pvc2 * v(n2,n1)
+ * v(n2,n1)) * tfac
ends rnod
3 c. m. O) n$ D! _9 t. x! M
紅色行為9709

好像是model出問題了，應該怎麼修改呢？