[Limdep Nlogit List] data editor, NLOGIT command

[H. KAMEYAMA in KU]

Greeting,

My dataset is constructed as follows.
There are 96 individual, 4 choise set and and their social demographical
information
as Q1-Q21C and Income.

I have two questions.

Q1: Although I can see that total sample 3840, in Data Editor I can not
see all, just up to 1900.
Does it matter for execution?
Q2: Regarding NLOGIT command, I received two error message, number 1099.
Are there anyprblems in the dataset?

--> NLOGIT ;Lhs=Choice,cset, alti
--> ;Choices=opt1,opt2,opt3,opt4
--> ;Model:
-->U(opt1,opt2,opt3)=ASC
+Btoku*Dtoku+Bkuma*Dkuma+Bkorea*dkorea+Bmumu*Dmumu ...
-->+Bgengen*Dgengen+Bwotr*Dwotr+Bprice*price/
-->U(opt4)=0$
Error: 1099: Obs. 278 responses should sum to 1.0. Sum is .0000.
Error: 1099: Obs. 278 responses should sum to 1.0. Sum is .0000.
--> stop$

Could you please take a look and any suggestion would be great help for me.
-- 

************************************************
KAMEYAMA, Hiroshi (亀山　宏)
Associate Professor
Farm Management,  Faculty of Agriculture 
Kagawa University, Japan 761-0795
2393 Ikenobe Miki-cho, Kita-gun, Kagawa 
〒761-0795 香川県木田郡三木町池戸2393
香川大学農学部　応用生物科学科生物資源生産学大講座
Phone: +81-(0)87-891-3054 (FAX: -3021. admin.,庶務)
URL:http://www.ag.kagawa-u.ac.jp/kameyama/index.html
Email: kameyama at ag.kagawa-u.ac.jp
************************************************

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