Linear programming

HI

I have some kind of error in my Lingo-code and I just can't find it.
Please help
I'm using LINGO7.

The error code is as follows:
Error code 21:
Error in line 22: krp=500,500,500;

21. IMPROPER USE OF ATTRIBUTE NAME.
This message is printed if an attribute name is used incorrectly; for instance, you may have attempted to use it as a scalar (single value) variable. Check your model’s syntax.

The Lingo-code looks like this:

"MODEL:

SETS:
Ti/t1,t2,t3/:Krp,Kop,Kre,Koe,CI,CS,CL;
Pr/p1..p3/:V,IL,I0,CSP,UP,STidP;
Re/r1..r3/:CSR,STidR,UR;
PAK/k1..k3/;
PT(Pr,Ti):D,I,X;
RT(Re,Ti):RR,OR,SBinR,B,Z;
PrRe(Pr,Re):F;
TPAK(Ti,PAK):Ka;
PTPAK(Pr,Ti,PAK):RP,OP,SBinP;
ENDSETS

DATA:
MB=9999999;
CLRP=196;
CLOP=400;
CLRE=240;
CLOE=480;
CIH=0.08/12;
Krp=500,500,200;
Kop=132,150,100;
Kre=445,500,91;
Koe=16,20,10;

V=14,15,13;
IL=5162,4000,3000;
I0=5162,4000,3000;
CSP=153,153,153;
UP=960,800,1000;
StidP=0.35,0.35,0.35;

CSR=964,964,964;
STidR=0.5,0.5,0.5;
UR=4500,5000,5500;

D=90000,90000,10000
90000,90000,0
90000,90000,0;

F=5.15,0,0
0,5,0
0,0,6;

ENDDATA
END"

Linear programming - Lingo