User Tools

Site Tools


Check List before contacting the GAMS support

In case you think GAMS or the solver fails, please provide us with as much relevant information as possible, such as:

  • Your operating system
  • GAMS version and solver used
  • Size and structure (linear, nonlinear etc.) of the model

Most of these information are included in the log file (.log):

  • If you are using the GAMSIDE, there will be a file called model_name.log in your GAMS project directory. Alternatively you may just copy and paste the content of the process window into an e-mail.
  • If you are working from the command line, please use the additional command line option lo=2 (e.g. gams trnsport.gms o=2) to redirect the screen output into a log file.

Find below an example of a log file (trnsport.log):

--- Job trnsport.gms Start 08/10/15 11:44:37 24.4.6 r52563 WEX-WEI x86 64bit/MS Windows
GAMS 24.4.6   Copyright (C) 1987-2015 GAMS Development. All rights reserved
Licensee: Franz Nelissen                                 S150318/0001CN-GEN
          GAMS Software GmbH                                         DC3459
--- Starting compilation
--- trnsport.gms(69) 3 Mb
--- Starting execution: elapsed 0:00:00.002
--- trnsport.gms(45) 4 Mb
--- Generating LP model transport
--- trnsport.gms(66) 4 Mb
---   6 rows  7 columns  19 non-zeroes

Please send us that file.

If possible also attach a (zipped) copy of your model and all necessary data files, which will allow us to reproduce the problem. In case there are confidential issues, you may send us a scalar version of your model, click here for instructions about that.

Our e-mail system can handle attachments up to a size of 15MB. If you have to send us larger files please use our file upload facility and send us the name of the uploaded file.

As a security measure to prevent potential viruses, our mail system does not accept executable files (such as files ending in .exe, bat, or cmd), even if they are sent in a zipped (.zip, .tar, .tgz, .taz, .z, .gz) format. Any message of this type sent to us will be bounced back you. Adding an underscore to the file attachment (e.g. file.zip_) will help.

Please also visit our Support Wiki.

You can reach GAMS by several means of communication: mail, fax and phone. The full addresses are:

  1. GAMS Development Corporation, USA
  2. GAMS Software GmbH, Germany
check_list.txt · Last modified: 2015/08/10 09:48 by support