Index of subset

[clarissa....@gmail.com]

Hello! I have some problem over summations index of subset. I can't solve it, AMPL shows me syntax error and index undefined.

Thank for your help.

[Mikhail]

Hello! I do not pretend to be 100% correct, but the syntax is fixed. Try this ..

[Clarissa Pannullo]

Thank you Mikhail, I was going crazy. Can I also ask you about my file .dat? AMPL gives me these errors:

line 40

offset 2283

wrong number of *'s for table

file -

line 50

offset 2542

only one set name allowed between colons

Error executing "solve" command:

error processing set START:

START contains ('M1',1), which is not

within CUCE cross GIRI;

Error executing "solve" command:

error processing set START:

START contains ('M1',2), which is not

within CUCE cross GIRI;

Error executing "solve" command:

error processing set START:

START contains ('M1',3), which is not

within CUCE cross GIRI;

Error executing "solve" command:

error processing set START:

START contains ('M2',4), which is not

within CUCE cross GIRI;

Error executing "solve" command:

error processing set START:

START contains ('M2',5), which is not

within CUCE cross GIRI;

Error executing "solve" command:

error processing param D:

invalid subscript D['C4','Multi'] discarded.

Error executing "solve" command:

error processing param TRFISSO:

5 invalid subscripts discarded:

TRFISSO[1]

TRFISSO[2]

TRFISSO[3]

and 2 more.

Error executing "solve" command:

error processing param TRVAR:

5 invalid subscripts discarded:

TRVAR[1]

TRVAR[2]

TRVAR[3]

and 2 more.

Error executing "solve" command:

error processing param TRKM:

5 invalid subscripts discarded:

TRKM[1]

TRKM[2]

TRKM[3]

and 2 more.

Error executing "solve" command:

error processing param TRT:

5 invalid subscripts discarded:

TRT[1]

TRT[2]

TRT[3]

and 2 more.

I'm reading many manuals to write the instructions but the problem could be my student version.

Thank you so much.

 

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Il giorno dom 27 set 2020 alle ore 20:41 Mikhail <rabt...@tut.by> ha scritto:

Hello! I do not pretend to be 100% correct, but the syntax is fixed. Try this ..

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[Mikhail]

Without a problem statement, it's hard enough to understand the whole logic of your model. In this regard, please provide a statement of the problem. Other than that, my AMPL output is different from the one you presented. In this regard, please provide your working * .mod file again.

понедельник, 28 сентября 2020 г., 10:04:37 UTC+3 пользователь Clarissa Pannullo написал:

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[AMPL Google Group]

There is a typing error in your data for set GIRI:

set GIRI: 1 2 3 4 5;

The : should be := here.

As a general rule, fix the first error that AMPL reports, then run your model and data again. Often when one error is fixed, some other errors disappear.

--
Robert Fourer
am...@googlegroups.com

{#HS:1293845051-89159#}

On Mon, Sep 28, 2020 at 11:27 AM UTC, AMPL Modeling Language <am...@googlegroups.com> wrote:

Without a problem statement, it's hard enough to understand the whole logic
of your model. In this regard, please provide a statement of the problem.
Other than that, my AMPL output is different from the one you presented. In
this regard, please provide your working * .mod file again.

понедельник, 28 сентября 2020 г., 10:04:37 UTC+3 пользователь Clarissa
Pannullo написал:

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Il giorno dom 27 set 2020 alle ore 20:41 Mikhail <rabt...@tut.by> ha
scritto:

On Sun, Sep 27, 2020 at 6:41 PM UTC, AMPL Modeling Language <am...@googlegroups.com> wrote:

Hello! I do not pretend to be 100% correct, but the syntax is fixed. Try this ..

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[Clarissa Pannullo]

Thank you for your help

To view this discussion on the web visit https://groups.google.com/d/msgid/ampl/reply-77152-1293845051-3717380084-1601298346-1393318771%40helpscout.net.

[Clarissa Pannullo]

Sorry, I still have problems with my model. This time, the AMPL output gives me not binary variables.

In file.docx my mathematical statement. 

Thanks in advance

[AMPL Google Group]

Be sure that you are telling AMPL to use a solver that can optimize over binary variables. This is done with an "option solver . . ." command. For example,

To use CPLEX, add: option solver cplex;
To use Gurobi, add: option solver gurobi;
To use Xpress, add: option solver xpress;

Other solvers, such as MINOS and SNOPT, will give an "ignoring integrality . . ." message and may return some fractional values for variables defined as binary.

If you continue to have this problem, copy your entire AMPL session -- everything that you typed and all lines that AMPL displayed -- into your email. Also attach the current version of your data file along with your model file.

--
Robert Fourer
am...@googlegroups.com

{#HS:1293845051-89159#}

On Wed, Sep 30, 2020 at 5:14 PM UTC, AMPL Modeling Language <am...@googlegroups.com> wrote:

Sorry, I still have problems with my model. This time, the AMPL output gives me not binary variables.
In file.docx my mathematical statement.
Thanks in advance

On Mon, Sep 28, 2020 at 3:41 PM UTC, AMPL Modeling Language <am...@googlegroups.com> wrote:

Thank you for your help

Il lun 28 set 2020, 15:05 AMPL Google Group <am...@googlegroups.com> ha scritto:

On Mon, Sep 28, 2020 at 1:05 PM UTC, AMPL Google Group <am...@googlegroups.com> wrote:

There is a typing error in your data for set GIRI:

set GIRI: 1 2 3 4 5;

The : should be := here.

As a general rule, fix the first error that AMPL reports, then run your model and data again. Often when one error is fixed, some other errors disappear.

--
Robert Fourer
am...@googlegroups.com

[Mikhail]

After you connect the required solver, you will need to fix the following errors:

1.in the declaration of the set MIXD: = (C1, Mono) (C2, Mono) (C3, Multi) (C4, Multi) (C5, Multi); the pair (C4, Multi) is used, and in param D: [C4, Mono] - this discrepancy needs to be corrected.

2. I think that the BETA parameter should have the values 0 or 1. Therefore, in its declaration you need to specify:

param: BETA (tr) default 0:=...

After these changes, you will receive the result of the solution.

[Mikhail]

Sory, param BETA (tr) default 0:=...