LINGO程序很奇怪的错误，求解答
能不能帮我看下这个代码，看看哪里错了？主要错误显示：@FOR(ZHILU(I):FR(I)=(FI(I)-FX(I))/FX(I));这句话附近
显示的错误如下：
Error 72
unable to solve for fixed variable
FR(ZHILU1)
in constraint
20
loosening the variable's bounds may help
谢谢耐心解答
MODEL:
SETS:
JIZHU/JIZHU1..JIZHU8/:GI0,GI1,V;
DUAN/DUAN1..DUAN10/:D;
ZHILU/ZHILU1..ZHILU6/:CC,FI,FX,FD,FR;
LINKS(JIZHU,DUAN):DJ,DR;
LINK(ZHILU,JIZHU):C;
ENDSETS
DATA:
GI0=120,73,180,80,125,125,81.1,90;
V=2.2,1,3.2,1.3,1.8,2,1.4,1.8;
CC=1.111224786317819 1.318676323930283 -1.096597047551148 0.783854251638765 1.338126254232463 1.220559749861743;
FX=165 150 160 155 132 162;
FD= 186.4500 177.0000 174.4000 172.0500 151.8000 184.6800;
DR=
70 0 50 0 0 30 0 0 0 40
30 0 20 8 15 6 2 0 0 8
110 0 40 0 30 0 20 40 0 40
55 5 10 10 10 10 15 0 0 1
75 5 15 0 15 15 0 10 10 10
95 0 10 20 0 15 10 20 0 10
50 15 5 15 10 10 5 10 3 2
70 0 20 0 20 0 20 10 15 5;
DJ=
-505 0 124 168 210 252 312 330 363 489
-560 0 182 203 245 300 320 360 410 495
-610 0 152 189 233 258 308 356 415 500
-500 150 170 200 255 302 325 380 435 800
-590 0 116 146 188 215 250 310 396 510
-607 0 159 173 205 252 305 380 405 520
-500 120 180 251 260 306 315 335 348 548
-800 153 183 233 253 283 303 318 400 800;
C= 0.0814 0.0482 0.0523 0.1197 -0.0277 0.1187 0.1259 -0.0021
-0.0550 0.1264 -0.0009 0.0331 0.0860 -0.1149 -0.0170 0.0988
-0.0680 0.0627 -0.1565 -0.0099 0.1258 0.0040 -0.0039 -0.1994
-0.0355 -0.1046 0.2048 -0.0207 -0.0140 0.0042 0.1472 0.0743
0.0003 0.2408 -0.0662 -0.0414 -0.0662 0.0689 -0.0021 -0.0104
0.2349 -0.0619 -0.0790 0.0930 0.0447 -0.0028 0.1677 -0.0011;
ENDDATA
MIN=@SUM(ZHILU(I):FR(I));
@FOR(JIZHU(I):GI1(I)<=GI0(I)+GI0(I)*V(I));
@FOR(JIZHU(I):GI1(I)<=@SUM(DUAN(J):DR(I,J)));
@FOR(JIZHU(I):GI1(I)>=GI0(I)-GI0(I)*V(I));
@SUM(JIZHU(I):GI1(I))=1052.8;
@FOR(ZHILU(I):FI(I)=@SUM(JIZHU(J):C(I,J)*GI1(J)+CC(I)));
@FOR(ZHILU(I):FI(I)=@ABS(FI(I)));
@FOR(ZHILU(I):FI(I)<=FD(I));
@FOR(ZHILU(I):FR(I)=(FI(I)-FX(I))/FX(I));
END
本帖最后由 qlb061 于 2013-10-18 11:42 编辑
使用调试选项：
!Constraints and bounds that cause an infeasibility:;
!Necessary Rows:
(If none of the necessary and sufficient rows are dropped,
then the model remains infeasible.);
FI_ZHILU2 + 0.055 * GI1_JIZHU1 - 0.1264 * GI1_JIZHU2 + 0.0009 * GI1_JIZHU3 -
0.0331 * GI1_JIZHU4 - 0.08599999999999999 * GI1_JIZHU5 + 0.1149 * GI1_JIZHU6 +
0.017 * GI1_JIZHU7 - 0.0988 * GI1_JIZHU8 = 10.54941059144227;
GI1_JIZHU1 + GI1_JIZHU2 + GI1_JIZHU3 + GI1_JIZHU4 + GI1_JIZHU5 + GI1_JIZHU6 +
GI1_JIZHU7 + GI1_JIZHU8 = 1052.8;
- 0.006666666666666667 * FI_ZHILU2 + FR_ZHILU2 = - 1;
!Necessary Variable Bounds:
(If none of the necessary and sufficient bounds are dropped,
then the model remains infeasible.);
FR_ZHILU2 >= 0;
GI1_JIZHU1 >= 0;
GI1_JIZHU3 >= 0;
GI1_JIZHU4 >= 0;
GI1_JIZHU5 >= 0;
GI1_JIZHU6 >= 0;
GI1_JIZHU7 >= 0;
GI1_JIZHU8 >= 0;
额，我用Lingo 11 运行没错误额，只是该模型没有可行解。。。
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