Extraction of custom mim caps partially broken

[marknmartin]

I have 2 mim caps.
cmim2 has a top plate on layer cap1 with M2 as the lower plate.
cap1 connects to M3 via capcontact
cmim2_m3 has the top plate on layer cap2 with M3 the lower plate.
cap2 connects to m4 via capcontact2
I have the planes in the following order

 metal2,m2
  cap1,c1
  metal3,m3
  cap2,c2
  metal4,m4

for extraction I then have

 device csubcircuit cmim2	*mimcap  *m2  w=w l=l
 device csubcircuit cmim2_m3	*mimcap2 *m3  w=w l=l

this all looks OK to me, but when I ran extract magic claims "Device missing 1 terminal"

I do have a work around. For some reason, it does not like when I use *m2 or *m3 for the lower layers. I changed these to metal2 and metal3 and it now seems to work.