[AMPL 2905] invalid subscripts discarded

[D.T. Fokum]

Hello,

I have a model that uses a parameter y. In my data file I have the
following statements:

param y  default 0 :=
[*,*,1]:
                0       1       2 :=
        2       1       .       .
        3       .       .       1
        4       .       1       .
[*,*,2]:
                0       1       2 :=
        5       1       .       .
        7       .       1       .
[*,*,3]:
                0       1       2 :=
        1       1       .       .
        6       .       1       . ;

However, when I try to solve my model I get a message that states:
Error executing "solve" command:
error processing param y:
        2 invalid subscripts discarded:
        y[5,0,2]
        y[7,1,2]

From earlier posts on this group I found this link:
http://www.ampl.com/FAQ/#WhydoIgetaninvalidsubscriptdiscardedmessagewhenIdisplayanAMPLparameter,
unfortunately the information there doesn't appear to be related to my
problem. What am I doing incorrectly?

Thanks,
Daniel

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[Robert Fourer-2]

The discarded invalid subscripts [5,0,2] and [7,1,2] correspond to the two
values in the parameter y data that have a third index equal to 2.  So most
likely the problem is that 2 is not a member of the third indexing set for
y.

Bob Fourer
4er@...

> -----Original Message-----
> From: ampl@... [mailto:ampl@...]
> On Behalf Of D.T. Fokum [fokumdt@...]
> Sent: Thursday, October 22, 2009 9:31 PM
> To: AMPL Modeling Language
> Subject: [AMPL 2905] invalid subscripts discarded
>
>
> Hello,
>
> I have a model that uses a parameter y. In my data file I have the
> following statements:
>
> param y  default 0 :=
> [*,*,1]:
>                 0       1       2 :=
>         2       1       .       .
>         3       .       .       1
>         4       .       1       .
> [*,*,2]:
>                 0       1       2 :=
>         5       1       .       .
>         7       .       1       .
> [*,*,3]:
>                 0       1       2 :=
>         1       1       .       .
>         6       .       1       . ;
>
> However, when I try to solve my model I get a message that states:
> Error executing "solve" command:
> error processing param y:
>         2 invalid subscripts discarded:
>         y[5,0,2]
>         y[7,1,2]
>
> From earlier posts on this group I found this link:
> http://www.ampl.com/FAQ/#WhydoIgetaninvalidsubscriptdiscardedmessagewhenId
> isplayanAMPLparameter,
> unfortunately the information there doesn't appear to be related to my
> problem. What am I doing incorrectly?
>
> Thanks,
> Daniel
>

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[D.T. Fokum]

Bob,

Thanks for your response; my problem is resolved. The third indexing set for y was UNIT, which I had defined as:
set UNIT:= 0 .. 3 by 1;

I dropped " by 1" from the set declaration and the model was solved correctly without any subscripts discarded.

Thanks,
Daniel

On Sat, Oct 24, 2009 at 2:20 PM, Robert Fourer <4er@...> wrote:

The discarded invalid subscripts [5,0,2] and [7,1,2] correspond to the two
values in the parameter y data that have a third index equal to 2.  So most
likely the problem is that 2 is not a member of the third indexing set for
y.

Bob Fourer
4er@...


> -----Original Message-----
> From: ampl@... [mailto:ampl@...]
> On Behalf Of D.T. Fokum [fokumdt@...]
> Sent: Thursday, October 22, 2009 9:31 PM
> To: AMPL Modeling Language
> Subject: [AMPL 2905] invalid subscripts discarded
>
>
> Hello,
>
> I have a model that uses a parameter y. In my data file I have the
> following statements:
>
> param y  default 0 :=
> [*,*,1]:
>                 0       1       2 :=
>         2       1       .       .
>         3       .       .       1
>         4       .       1       .
> [*,*,2]:
>                 0       1       2 :=
>         5       1       .       .
>         7       .       1       .
> [*,*,3]:
>                 0       1       2 :=
>         1       1       .       .
>         6       .       1       . ;
>
> However, when I try to solve my model I get a message that states:
> Error executing "solve" command:
> error processing param y:
>         2 invalid subscripts discarded:
>         y[5,0,2]
>         y[7,1,2]
>
> From earlier posts on this group I found this link:
> http://www.ampl.com/FAQ/#WhydoIgetaninvalidsubscriptdiscardedmessagewhenId
> isplayanAMPLparameter,
> unfortunately the information there doesn't appear to be related to my
> problem. What am I doing incorrectly?
>
> Thanks,
> Daniel
>

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