Syntax error

[nasim]

Hello
I m writing a simple farm profit maximization model. I wrote the simple form and I got the answer which means that the model works, but when I used set notation to define variables I got many Syntax errors. Below is the model. would you please help me? I cannot understand where is the problem.


option sysout=off;

sets
i "option" /p,b,s,d/
j "products" /c,l,m/
k "type of product" /1,2,3,4,5,6,7,8,9,10,11,12,13,14/;

Alias (i,ii,iii)

variables
z total farm profit
x(i,j,k) amount of produced bought sold or distributed of each type of crop livestock or manure;

parameters
y(k) profit of each crop type/

"1" 937.45
"2" 9712.7
"3" 1011.43
"4" 10156.57
"5" 1085.41
"6" 10600.44
"7" 1140.89
"8" 10933.34
"9" 1002.13
"10" 118.03
"11" 484.42
"12" 365.39
"13" 532.91
"14" 0
/

equations

OBJ
land1
land2
machin1
machin2
machin3
machin4
livestock1
livestock2
feeding1
feeding2
feeding3
feeding4
rotation1
rotation2
rotation3
rotation4
rotation5
disposal1
disposal2
disposal3
spreading1
spreading2
spreading3;

OBJ..z=E= sum(k, x(p,c,k)* y(k)) + 1849*x(p,l,1)+ 53854*x(p,l,2)- 258.5*x(b,c,1) - 258.5*x(b,c,2) - 205.7*x(b,c,9) +15.70*x(s,m,3) -3.374*x(d,m,1) - 6.90*x(d,m,2);
land1.. sum(k$ x(p,c,k) lt14 ,x(p,c,k))=L=400;
land2.. x(p,c,14)=L=23;
.
.
.
the errors show problem with the firm line of OBJ function!!

Thank you so much

[Renger]

Hi
If you write x(p,c,k), you probably mean x("p", "c",k). If you want to use specific set elements in an expression, you should use it like shown.
Cheers
Renger