[Limdep Nlogit List] cml with latent class frontier model

[Giovanni Trovato]

dear limpders,


I employ a latent class cost frontier  model in wich I need to specify 
some constraint to assure the necessary corvature requirements.
I write so the lines

Frontier; Lhs=LNCN; Rhs=x
           ;cost
           ;cml: b(3)+b(4)=1, b(10)=0, b(11)+b(12)=0, b(23)+b(24)=1, b(32)=0, b(33)+b(34)=0
           ;LCM 
           ;pds=_groupti; pts=2; group=g2cob; res=latu; cprob=probcob$


The parameters are 22 (lambda and sigma included) for fixed SFM and 46 
for Latent Class with two groups (lambda, sigma and the two class 
probablities included).

When I run the command  the procedure does not get any kind of results.

Where are my errors?

Thank you

-- 
Giovanni Trovato
Dept. of Economics and Institution
University of Rome "Tor Vergata"
Via Columbia, 2
I - 00133 Rome - Italy 
tel +39 0672595649
fax +39 062020687