Some components I use for design that are not in the standard libraries. Edit the file standard.jft and add the following info at the end :

.model J310 NJF(Beta=3.384m Rd=1 Rs=1 Lambda=17m Vto=-3.409 
Is=193.9f Cgd=6.2p Pb=1 Fc=.5 Cgs=6.2p Kf=46.34E-18 Af=1)
.model BF245A NJF(VTO=-2 BETA=0.9M LAMBDA=6m RD=2.21. + RS=1.99 
IS=26.3F PB=1 FC=.5 CGS=2.12P CGD=2.52P)
.model 2N7000 NMOS( LEVEL=3 RS=0.205 NSUB=1.0E15 DELTA=0.1 KAPPA=0.0506 
TPG=1 CGDO=3.1716E-9 RD=0.239 VTO=1.000 VMAX=1.0E7 ETA=0.0223089 NFS=6.6E10 
TOX=1.0E-7 LD=1.698E-9 UO=862.425 XJ=6.4666E-7 THETA=1.0E-5 CGSO=9.09E-9 
L=2.5E-6 W=0.8E-2)

Make sure each component info is written in one line and not wrapped.