Where can I possibly start if my model continues to give a Retcode = -1? In other words, what are some of the most common reasons as to why a model will not converge?
I tried a 2-comp and then reduced it to 1-comp. The AIC and BIC improve with a 1-comp. However, no matter what residual error model I use, my graphs for CWRES vs IVAR and CWRES vs IPRED look off by a lot.
If model is not converging, how am I getting theta's and SDs and all diagnostic plots?
Thanks,
Richa Dua