Hi, I keep getting a syntax error on my code and I don’t know where I’m going wrong. Would appreciate any help.

I have 4 files so to be sure I’ll show them all.

Installation:

```
# Install and use AMPL with any solver on Colab
!pip install -q amplpy
from amplpy import tools
ampl = tools.ampl_notebook(
modules=['cplex'],
license_uuid="default")
```

Model.mod:

```
%%writefile model.mod
# Sets
set M;
# Parameters
param tw;
param tb;
param tm;
param tp;
param mpq{M};
param p{M};
param w{M};
param b{M};
param m{M};
param pl{M};
# Variables
var x{M} >= 0;
var y{M} binary;
# Objective
maximize profit : sum{m in M} p[m] * x[m];
# Constraints 1: Resource Limits Constraints
subject to wheels_constraint:
sum{m in M} w[m] * x[m] <= tw;
subject to bolts_constraint:
sum{m in M} b[m] * x[m] <= tb;
subject to metal_constraint:
sum{m in M} m[m] * x[m] <= tm;
subject to plastic_constraint:
sum{m in M} pl[m] * x[m] <= tp;
# Constraint 2: Minimal Production Constraints
subject to minimal_production_constraint{m in M}:
mpq[m] * y[m] <= x[m] <= 100000 * y[m];
# Constraint 3: Binary Variable Constraints
subject to binary_variable_constraints{m in M}:
0 <= y[m] <= 1;
# Constraints 4: Models Constraints
subject to models_constraint1:
y[4] + y[5] + y[6] <= 2;
subject to models_constraint2:
y[1] <= y[3];
subject to models_constraint3:
y[7] + y[8] = 1;
```

Data.dat:

```
%%writefile data.dat
set M := 1..10;
param : p mpq :=
1 10 200
2 13 135
3 27 270
4 8 80
5 14 45
6 20 120
7 42 420
8 32 72
9 60 460
10 35 83;
param : w b m pl :=
1 4 12 0 20
2 4 0 0 13
3 4 22 0 2
4 5 8 2 8
5 6 0 4 5
6 0 12 1 2
7 0 8 4 0
8 0 4 7 0
9 0 2 4 0
10 0 10 8 0;
param tw := 100000;
param tb := 100000;
param tm := 90000;
param tp := 200000;
```

Running everything:

```
%%ampl_eval
reset;
option solver cplex;
option presolve 0;
option cplex_options 'presolve 0 sensitivity';
model model.mod;
data data.dat;
solve;
```

The problem specifically seems to happen inside Model.mod in the objective function. Everything looks correct to me but I may be missing something fairly obvious…