GAMS World Forum

Hi GAMS MIRO Users,

We started distributing MIRO 1.3 on February 5, 2021.

You can download the software from https://gams.com/miro/download.html

Here are the release notes: https://gams.com/miro/release.html#v13

Your GAMS MIRO Team
www.gams.com

Hi GAMS Users,

We started distributing GAMS Minor Release 34.2.0 on February 5, 2021.

You can download the software from https://www.gams.com/download/

Here are the release notes: https://www.gams.com/latest/docs/RN_34.html#RN_3420

Your GAMS Team
www.gams.com

Your "$(check(i) ne 0 or mapval(check(i)) eq 8)" is equivalent to just "$check(i)". -Michael

No rudeness implied. Just repeating the rules of the forum. To the issue. As I mentioned you have to follow the Mosek requirements precisely. Mosek (or the GAMS/MOSEK link) is not the greatest help to debug. Basically, you have two choices for SOCP with Mosek: 2*r*s =g= sum(i, sqr(x(i)) or sqr(r) =g...

For numerical comparison eps and 0 behave identically. Eps is present in the data, 0 is not, so the following code hopefully explains this: set i / i0*i2 /; parameter p(i) / i0 eps, i1 1, i2 2 /; scalar card_p; $eolcom ! card_p = card(p); display card_p; ! gives 3 card_p = sum(i$p(i),1); display car...

Hi GAMS Users,

We started distributing GAMS Release 34.1.0 on January 29, 2021.

You can download the software from https://www.gams.com/download/

Here are the release notes: https://www.gams.com/latest/docs/RN_34.html

Your GAMS Team
www.gams.com

You seek free advice, so please share the model with everyone or get professional help. -Michael

Make up some data and provide a executable model that reproduces the issue. MOSEK is very strict in the requirements of the cone. For example, making S a positive variable already breaks the requirements.

-Michael

You should study the following chapter: https://www.gams.com/33/docs/UG_CondExpr.html. Your two examples are described in the section "Dollar on the left" (https://www.gams.com/33/docs/UG_CondExpr.html#UG_CondExpr_DollarOnTheLeft). If the comparison operator is left out then you can add &q...

The model class MCP (or MPEC) lets you model primal and dual variables explicitly. This has it's own theory and you will need to study this in detail. You might start at https://www.gams.com/latest/docs/UG_Mod ... odels_MPEC and keep on reading.

-Michael