[Limdep Nlogit List] (no subject)

[Craig Gallet]

Hello:
 
I am currently trying to estimate a truncated model (lower tail limit for lhs variable = 0) using random effects.  I continue to get the following error messages:
 
Warning   137: Iterations: function not computable at crnt. trial estimate
  Error   802: Cannot compute function at current values. Exit status=4
All of the rhs variables in my model are dummy variables.  Is this the likely reason for these error messages?  I'm able to estimate the model without truncation.  Also, if I change the lower limit to say -0.5, I can get the model to run (but nontheless need 0 for the lower limit).  I've also tried alternative algorithims, but they have failed each time.  Any suggestions would be greatly appreciated.
 
Craig