Error in Indexing and subscripts

[DINESH BABU]

Hi, 

I am getting error on using index and subscripts. Can anyone tell me how to solve it?

#param.dat 

set M := 1 2;

param:  hi    hf    xi    xf        vi   bi    mi    s     K       J        r    fo      qo      po        ttrop  ctrop       xh  yh   g_0   R_e      cdo    clmax  gamma  machdiverg  masatierra  ctegravitacional :=

     1  9000  0     0     20000     120  0.06  4909  21.5  0.073   -6.5e-3  287  288.15  1.1225  101.325   2670   3.2778e-4   0.7 0.2  9.81  6378000  0.023  1.4    1.4    0.88        5.9736e24   6.6742e-11  

     2  9000  0     0     20000     120  0.06  4909  21.5  0.073   -6.5e-3  287  288.15  1.1225  101.325   2670   3.2778e-4   0.7 0.2  9.81  6378000  0.023  1.4    1.4    0.88        5.9736e24   6.6742e-11  ;

First Code;

set M;

var Q {i in N, (j,l) in M: l>j} >=0, <=1;

Constraints:

Q1 {i in N, (j,l) in M: l>j}:      Q[j,l,i]*(x[j,i]-x[l,i]-dx)>=0;

Q2 {i in N, (j,l) in M: l>j}:      Q[j,l,i]*(x[l,i]-x[j,i]-dx)>=0;

Q3 {i in N, (j,l) in M: l>j}:      Q[j,l,i]*(h[j,i]-h[l,i]-dh)>=0;

Q4 {i in N, (j,l) in M: l>j}:      Q[j,l,i]*(h[l,i]-h[j,i]-dh)>=0;

Error;

Glider.ampl, line 88 (offset 1143):

2 indices for set of dimen 1

context:  var Q {i in N, (j,l) in  >>> M:  <<< l>j} >=0, <=1;

Glider.ampl, line 152 (offset 3770):

2 indices for set of dimen 1

context:  Q1 {i in N,(j,l) in  >>> M:  <<< l>j}:      Q[j,l,i]*(x[j,i]-x[l,i]-dx)>=0;

Glider.ampl, line 152 (offset 3784):

Q needs 2 subscripts, not 3

context:  Q1 {i in N,(j,l) in M: l>j}:       >>> Q[j,l,i] <<< *(x[j,i]-x[l,i]-dx)>=0;

Glider.ampl, line 153 (offset 3836):

2 indices for set of dimen 1

context:  Q2 {i in N,(j,l) in  >>> M:  <<< l>j}:      Q[j,l,i]*(x[l,i]-x[j,i]-dx)>=0;

Glider.ampl, line 153 (offset 3850):

Q needs 2 subscripts, not 3

context:  Q2 {i in N,(j,l) in M: l>j}:       >>> Q[j,l,i] <<< *(x[l,i]-x[j,i]-dx)>=0;

Glider.ampl, line 154 (offset 3902):

2 indices for set of dimen 1

context:  Q3 {i in N,(j,l) in  >>> M:  <<< l>j}:      Q[j,l,i]*(h[j,i]-h[l,i]-dh)>=0;

Glider.ampl, line 154 (offset 3916):

Q needs 2 subscripts, not 3

context:  Q3 {i in N,(j,l) in M: l>j}:       >>> Q[j,l,i] <<< *(h[j,i]-h[l,i]-dh)>=0;

Glider.ampl, line 155 (offset 3968):

2 indices for set of dimen 1

context:  Q4 {i in N,(j,l) in  >>> M:  <<< l>j}:      Q[j,l,i]*(h[l,i]-h[j,i]-dh)>=0;

Glider.ampl, line 155 (offset 3982):

Q needs 2 subscripts, not 3

context:  Q4 {i in N,(j,l) in M: l>j}:       >>> Q[j,l,i] <<< *(h[l,i]-h[j,i]-dh)>=0;

Second code;

var Q {i in N, j in M,l in O[j]: l>j} >=0, <=1;

constraints;

Q1 {i in N,j in M,l in O[j]: l>j}:      Q[j,l,i]*(x[j,i]-x[l,i]-dx)>=0;

Q2 {i in N,j in M,l in O[j]: l>j}:      Q[j,l,i]*(x[l,i]-x[j,i]-dx)>=0;

Q3 {i in N,j in M,l in O[j]: l>j}:      Q[j,l,i]*(h[j,i]-h[l,i]-dh)>=0;

Q4 {i in N,j in M,l in O[j]: l>j}:      Q[j,l,i]*(h[l,i]-h[j,i]-dh)>=0;

Error;

Glider.ampl, line 88 (offset 1146):

O is not defined

context:  var Q {i in N, j in M,l in  >>> O[j]:  <<< l>j} >=0, <=1;

Glider.ampl, line 152 (offset 3779):

O is not defined

context:  Q1 {i in N,j in M,l in  >>> O[j]:  <<< l>j}:      Q[j,l,i]*(x[j,i]-x[l,i]-dx)>=0;

Glider.ampl, line 153 (offset 3851):

O is not defined

context:  Q2 {i in N,j in M,l in  >>> O[j]:  <<< l>j}:      Q[j,l,i]*(x[l,i]-x[j,i]-dx)>=0;

Glider.ampl, line 154 (offset 3923):

O is not defined

context:  Q3 {i in N,j in M,l in  >>> O[j]:  <<< l>j}:      Q[j,l,i]*(h[j,i]-h[l,i]-dh)>=0;

Glider.ampl, line 155 (offset 3995):

O is not defined

context:  Q4 {i in N,j in M,l in  >>> O[j]:  <<< l>j}:      Q[j,l,i]*(h[l,i]-h[j,i]-dh)>=0;

How to defined the ¨O¨ as a set or var or param?

Thanks,

Dinesh.

 

[Victor Zverovich]

You try to iterate M as a two-dimensional set

  (j,l) in M

but M is declared one-dimensional:

  set M;

You should either use a single index in iteration j in M or make M two-dimensional:

  set M dimen 2;

HTH,

Victor

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[DINESH BABU]

Hi Victor,

I can´t change M from one dimensional to two dimensional. The M is defined the no of aircraft. Example set M := 1 2; 

The main problem is keep distance between aircraft 1 and aircraft 2. So I need to  this constraints 

set M : 1 2;

   Q[i,j,l]*(x[1,i]-x[2,i]-dx)>=0;

param dx := 100;

That´s I am trying to use this two subscripts in constraints.

Q1 {i in N, (j,l) in M: l>j}:      Q[j,l,i]*(x[j,i]-x[l,i]-dx)>=0;

Q1 {i in N,j in M,l in O[j]: l>j}:      Q[j,l,i]*(x[j,i]-x[l,i]-dx)>=0;

But I am getting error in both subscripts. And I have attached my mode and data file for reference.

[Victor Zverovich]

Then what you need is probably iterating over M twice:

  i in M, j in M

instead of

  (i, j) in M

HTH,

Victor

[DINESH BABU]

oh!! really thanks victor . I will try it and let you know. 

Regards,

Dinesh.