Search found 16 matches

Go to advanced search

by Freddy
10 months ago
Forum: Bugs
Topic: Gams engine login problem
Replies: 2
Views: 2604

Re: Gams engine login problem

Hi,

Which Engine instance are you using? The best way is to contact GAMS support directly: support@gams.com
If you are not using Engine SaaS, it would be best if your system administrator contacts us.

Best,
Freddy
by Freddy
2 years ago
Forum: GAMS MIRO
Topic: MIRO Database connection error
Replies: 2
Views: 10038

Re: MIRO Database connection error

Cyprien, I assume you are on Windows and have some non-English characters in your username (like ä, ö, é)? MIRO currently does not support such paths on Windows. Please try to uninstall MIRO and install again for everyone (so that the installation files are located in C:\Program Files instead of C:\...
by Freddy
2 years ago
Forum: GAMS MIRO
Topic: GAMS MIRO setup
Replies: 4
Views: 6127

Re: GAMS MIRO setup

Danrome, what you can do if you want to create a default scenario with the parameter being initialized to 1, but allow the users to change these values via MIRO is to check whether you r model runs under MIRO or not when assigning to your parameter. You can do so by checking whether the GAMS option ...
by Freddy
2 years ago
Forum: GAMS MIRO
Topic: GAMS MIRO setup
Replies: 4
Views: 6127

Re: GAMS MIRO setup

Danrome, between $onExternalInput and $offExternalInput you declare GAMS symbols to be read by MIRO. The symbols you declared in the camcge.gms model are parameters that are calculated by other parameters. This means that the values read by MIRO would be overwritten. So it makes no sense to declare ...
by Freddy
3 years ago
Forum: Syntax
Topic: Using slash/backslash in path specification with $include
Replies: 2
Views: 2510

Re: Using slash/backslash in path specification with $include

You can (and should) use

Code: Select all

%system.dirsep%
like so:

Code: Select all

$include input_data%system.dirsep%Services.txt
by Freddy
3 years ago
Forum: Archive Google Group
Topic: Error 170
Replies: 1
Views: 6007

Re: Error 170

warkcrm, the first dimension in a GAMS table is the row dimension. You need to swap the indices for the parameter T (or transpose the table) as so: Sets i "Plantas" /Armenia,Pereira,Manizales / j "Zonas" /1,2,3,4,5/; Table T (j,i) "Costo de transportar de la planta i a la zo...
by Freddy
3 years ago
Forum: Tools
Topic: Encoding problem with cyrillic letters in a gdx-file
Replies: 3
Views: 3490

Re: Encoding problem with cyrillic letters in a gdx-file

akos, How are you viewing your gdx file? Gdx does not know anything about encoding. This means it stores explanatory text with the same enconding as the .gms file with your „execute_unload“ command. GAMS Studio provides a way to reload the current file with a different encoding via „Edit“->“Reload w...
by Freddy
3 years ago
Forum: Tools
Topic: gdxrrw Mac OS
Replies: 5
Views: 7014

Re: gdxrrw Mac OS

Hello. The problem is that the gdx library is not in the path you specified. Instead, use:

Code: Select all

igdx("/Applications/GAMS30.3/Resources/sysdir")
by Freddy
4 years ago
Forum: Modeling
Topic: how to get any element from a two dimensional set
Replies: 4
Views: 5439

Re: how to get any element from a two dimensional set

How about this?

Code: Select all

Set i /1*3/;  
set j /1*3/;  
Set a(i,j) /1.2,2.3,1.3/;
set b(i,j);
b(i,j)$(ord(i) = 3 and ord(j) = 1) = yes;
by Freddy
4 years ago
Forum: GAMS MIRO
Topic: Is it possible to pass on miro input to a $call command?
Replies: 2
Views: 7515

Re: Is it possible to pass on miro input to a $call command?

Hello, Jason, MIRO currently assigns values to GAMS parameters at the end of the compilation phase (right before the start of the execution phase). Therefore, Input is always 1 at the time your expression is evaluated. Admittedly, this behavior is not entirely intuitive and will most likely change b...

Go to advanced search