[GAMSlinks] Hi

[Stefan Vigerske]

Hi,

no, it should not affect any other files in the GAMS system.
If you have a recent GAMS release then it already includes a version of 
the Ipopt solver named COINIPOPT, but the one that will be installed by 
gmsip_.zip will be known as IPOPT to GAMS, so you will have both 
installed in parallel.
If you want to be sure, then you can also have a look which files are 
included in gmsip_.zip (it should be something like gmsip_ux.out 
gmsip_us.run and install/gmsip_un.dat for Unix-like systems).
Copying gmsip_.zip into the directory of your GAMS distribution and 
calling gamsinst will unpack the zip file and start the configuration 
dialog where you can setup a default solver for each model type. If you 
just keep the defaults there, then also this behaviour should not change.

Btw, I see that you have been using the 0.2 branch of the GAMSlinks.
A few weeks ago I made a new 0.3 stable version. The changes that 
concern Ipopt are marginal, so I think 0.2.2 should be fine. But in case 
that you want to use also Clp, Cbc, Glpk, or Bonmin, I suggest to use 
the GAMSlinks 0.3 stable revision. Unfortunately, until now this 
revision is only available via subversion, because I have not made a new 
release (0.3.0) yet (because I depend on a pre-stable revision of 
Bonmin). However, as mentioned, for Ipopt the changed from 0.2 to 0.3 
are marginal, and using GAMSlinks 0.2.2 and maybe HSL as Ipopts linear 
solver is a good idea :-).

Best,
Stefan

Roy wrote:
> I want to install IPOPT solver in GAMS, and I downloaded the GAMSlink from the 
> source and got the following version:
>  
> GAMSlinks-0.2.2.zip 
> <http://www.coin-or.org/download/source/GAMSlinks/GAMSlinks-0.2.2.zip>         
> 26-Oct-2007 03:01  6.0M 
>  
> It seems that I did the right things following the instructions of installation, 
> finally I got the follwoing files in bin:
> gmscc_.zip  gmscg_.zip  gmsip_.zip
>  
> According to the instruction, I am supposed to do the following:
> "To install them in your GAMS system, you copy these files into the GAMS system 
> directory and call gamsinst there. gamsinst will then unpack the files and makes 
> GAMS aware about the new solvers . "
>  
> I am just wondering, if I cope these three files into the GAMS system directory, 
> and call gamsinst there, will this affect other files which have already been 
> installed, such as other solvers or license files? Becasue the GAMS system we 
> own is a licensed version for Universities and I don't want to have any effect 
> over others usage of GAMS.
>  
> Thanks a lot
>  
> Roy
> 
> 
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-- 
Stefan Vigerske
Humboldt University Berlin, Numerical Mathematics
http://www.math.hu-berlin.de/~stefan