I have made the folloowing model:
set SalesRep;
set Brick;
param distance {i in SalesRep, j in Brick};
param workload {j in Brick};
param existing {i in SalesRep, j in Brick} binary;
var select {i in SalesRep, j in Brick} binary;
minimize Trans_Cost: sum{(i,j) in SalesRep cross Brick} distance[i,j]*select[i,j];
subject to Representative {j in Brick}:
sum{i in SalesRep} select[i,j] = 1;
subject to Index {i in SalesRep}:
0.8 <= sum{j in Brick} workload[j]*select[i,j] <= 1.2;
The data file for it is:
set SalesRep := SR1 SR2 SR3 SR4;
set Brick := BR1 BR2 BR3 BR4 BR5 BR6 BR7 BR8 BR9 BR10 BR11 BR12 BR13 BR14 BR15 BR16 BR17 BR18 BR19 BR20 BR21 BR22;
param workload :=
BR1 0.1609
BR2 0.1164
BR3 0.1026
BR4 0.1516
BR5 0.0939
BR6 0.132
BR7 0.0687
BR8 0.093
BR9 0.2116
BR10 0.2529
BR11 0.0868
BR12 0.0828
BR13 0.0975
BR14 0.8177
BR15 0.4115
BR16 0.3795
BR17 0.071
BR18 0.0427
BR19 0.1043
BR20 0.0997
BR21 0.1698
BR22 0.2531;
param distance :=
SR1 SR2 SR3 SR4:
BR1 16.16 24.08 24.32 21.12
BR2 19 26.47 27.24 17.33
BR3 25.29 32.49 33.42 12.25
BR4 0 7.93 8.31 36.12
BR5 3.07 6.44 7.56 37.37
BR6 1.22 7.51 8.19 36.29
BR7 2.8 10.31 10.95 33.5
BR8 2.87 5.07 5.67 38.8
BR9 3.8 8.01 7.41 38.16
BR10 12.35 4.52 4.35 48.27
BR11 11.11 3.48 2.97 47.14
BR12 21.99 22.02 24.07 39.86
BR13 8.82 3.3 5.36 43.31
BR14 7.93 0 2.07 43.75
BR15 9.34 2.25 1.11 45.43
BR16 8.31 2.07 0 44.43
BR17 7.31 2.44 1.11 43.43
BR18 7.55 0.75 1.53 43.52
BR19 11.13 18.41 19.26 25.4
BR20 17.49 23.44 24.76 23.21
BR21 11.03 18.93 19.28 25.43
BR22 36.12 43.75 44.43 0;
param existing: SR1 SR2 SR3 SR4:=
BR1 0 0 0 1
BR2 0 0 0 1
BR3 0 0 0 1
BR4 1 0 0 0
BR5 1 0 0 0
BR6 1 0 0 0
BR7 1 0 0 0
BR8 1 0 0 0
BR9 0 0 1 0
BR10 0 1 0 0
BR11 0 1 0 0
BR12 0 1 0 0
BR13 0 1 0 0
BR14 0 1 0 0
BR15 1 0 0 0
BR16 0 0 1 0
BR17 0 0 1 0
BR18 0 0 1 0
BR19 0 0 0 1
BR20 0 0 0 1
BR21 0 0 0 1
BR22 0 0 0 1;
Finally I made a run file:
reset;
model Code2.mod;
data code2.dat;
option solver gurobi;
solve;
display Trans_Cost;
I am receiving the following error:
ampl: include code2.run;
code2.dat, line 29 (offset 475):
expected number
context: SR1 SR2 >>> SR3 <<< SR4:
ampl:
please advice how to solve this. Thank you!!