Search found 18 matches

by scsaxena
1 month ago
Forum: Syntax
Topic: Using GAMS on MAC
Replies: 3
Views: 150

Re: Using GAMS on MAC

Thanks Renger for your response. My problem is as follows: I have a GAMS code for Economic Despatch of Generation (Power Generation) which is perfectly working on a Windows environment. The input data is placed in an Excel file and I have used GDXXRW function for input and output which creates the "...
by scsaxena
1 month ago
Forum: Syntax
Topic: Using GAMS on MAC
Replies: 3
Views: 150

Using GAMS on MAC

I have installed GAMS on my MacBook Air. While trying to run my code I got a series of errors all pointing to the GAMS environment. I have used Excel for input/output of my data and thus use GDX files which I learnt are meant for Windows OS. What is the work around for the GDX file if I want to use ...
by scsaxena
5 months ago
Forum: Modeling
Topic: Identifying causes of infeasibility
Replies: 4
Views: 391

Re: Identifying causes of infeasibility

Thank you Fred.
I was unaware of this possibility of CPLEX giving the smallest relaxation to make the model feasible.

We would try out.

Thanks once again for your inputs.

Best regards,
by scsaxena
5 months ago
Forum: Modeling
Topic: Identifying causes of infeasibility
Replies: 4
Views: 391

Re: Identifying causes of infeasibility

Thanks Fred for your response. We are using LP with CPLEX Solver. Extracts of the Model and Solver Status from the LST file are as given below: GAMS 26.1.0 rf2b37b9 Released Feb 2, 2019 WEX-WEI x86 64bit/MS Windows 04/06/19 22:33:36 Page 6 G e n e r a l A l g e b r a i c M o d e l i n g S y s t e m ...
by scsaxena
5 months ago
Forum: Modeling
Topic: Identifying causes of infeasibility
Replies: 4
Views: 391

Identifying causes of infeasibility

We are implementing Security Constrained Economic Despatch in our jurisdiction. The model being used is pretty standard but does not use Artificial variables in any of the constraint equations. We are facing a problem of infeasibility quite frequently. How do we identify the exact reason for infeasi...
by scsaxena
1 year ago
Forum: Syntax
Topic: Reading from CSV Files
Replies: 4
Views: 1024

Re: Reading from CSV Files

Thanks Gideon.
I would go through the reference given and would attempt.

Best regards,
by scsaxena
1 year ago
Forum: Syntax
Topic: Reading from CSV Files
Replies: 4
Views: 1024

Reading from CSV Files

Hello, I am a new user of GAMS and am looking for some examples / tutorial to help me read in a CSV file and likewise write to a CSV File. Would be thankful if someone could guide me or point me to a resource where I can find such usage. The CSV file I am trying to read is attached for reference. Th...
by scsaxena
1 year ago
Forum: Syntax
Topic: Unable to find GDX File for input data from
Replies: 7
Views: 1483

Re: Unable to find GDX File for input data from

Thanks a lot Fred.

I would get this updated.

Best regards,

Samir
by scsaxena
1 year ago
Forum: Syntax
Topic: Unable to find GDX File for input data from
Replies: 7
Views: 1483

Re: Unable to find GDX File for input data from

Further working on the program, I am getting "Exit Code 7" when I try to write the output to an Excel File. I understand this means that GDX file is not found.
I am attaching the Code and Error Log.
Shall be very thankful for your help.

Regards,
by scsaxena
1 year ago
Forum: Syntax
Topic: Unable to find GDX File for input data from
Replies: 7
Views: 1483

Re: Unable to find GDX File for input data from

Dear Fred, Thanks a lot. This was really helpful in solving both problems - (a) reading the dat I wanted - You rightly pointed out that file extension was incorrect. (b) creating the GDX file in a desired directory. The final GAMS code file that I run successfully is attached. Best regards, Samir