[Limdep Nlogit List] Random parameter logit with unbalanced panel data

[shafiul azam]

Hi,I was trying to run a random parameter logit model with unbalanced panel data set, but its returning below error:Error   1081: Mismatch of # indivs. and number implied by groups

However for fixed effect or random effect model; panel data model is running fine. Can you please advise what to do?Is it a bug in the software?Thanks in advance.
the code is: SET PANEL; GROUP=VEHICLE_;Pds=ti$ RPLOGIT;Lhs=CHOICE;Choices=left,straight,right;Model: U(left)= lclear*clearspa+lrelative*relative+lhd*heavydum+lresist*resistin+lcsr*centerli /    U(straight)    = sc +sclear * clearspa+srelative*relative+shd*heavydum/    U(right)    = rclear * clearspa+rrelative*relative+rhd*heavydum+rresist*resistin+rcsr*centerli    ; Fcn=lc(n), sc(n)    ;Panel$Error   1081: Mismatch of # indivs. and number implied by groups


Md Shafiul AzamRoad Assets EngineerCentral coast Counciland Research Staff(PhD) Queensland University of Technologymobile:0424875076