In case you think GAMS or the solver fails, please provide us with as much relevant information as possible, such as:
Most of these information are included in the log file (.log):
model_name.login your GAMS project directory. Alternatively you may just copy and paste the content of the process window into an e-mail.
gams trnsport.gms lo=2) to redirect the screen output into a log file.
Find below an example of a log file (
--- 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: