system estimation

[Hadizatou]

Hello,
I try to estimate a system equation ( panel data), with seemingly Unrealed regression method. I receive message error: "near single matrix". My system:
log(TC)=C(1)+C(2)*log(Q)+C(3)*log(PC)+C(4)*log(PT)+C(5)*log(PD)+C(6)*log(TIC)+C(7)*(1/2)*log(Q)*log(Q)+C(8)*(1/2)*log(PC)*log(PC)+C(9)*(1/2)*log(PT)*log(PT)+C(10)*(1/2)*log(PD)*log(PD)+C(11)*(1/2)*log(TIC)*log(TIC)+C(12)*log(PC)*log(PT)+C(13)*log(PC)*log(Q)+C(14)*log(PC)*log(PD)+C(15)*log(PC)*log(TIC)+C(16)*log(PT)*log(Q)+C(17)*log(PT)*log(PD)+C(18)*log(TIC)*log(PT)+C(19)*log(PD)*log(Q)+C(20)*log(PD)*log(TIC)+C(21)*log(TIC)*log(Q)

log(SPD)= C(22)+C(23)*log(PD)+C(24)*log(PC)+C(25)*log(PT)+C(26)*log(Q)+C(27)*log(TIC)

log(STIC)=C(28)+C(29)*log(TIC)+C(30)*log(PC)+C(31)*log(PT)+C(32)*log(Q)+C(33)*log(PD)

log(SPT)=C(34)+C(35)*log(PT)+C(36)*log(PC)+C(37)*log(TIC)+C(38)*log(Q)+C(39)*log(PD)

[EViews Gareth]

Sounds like you have a singularity problem going on. Hard to tell what is causing it without seeing the workfile.