[GEKKO] :: APM Linux server

[Jesus Febres]

Hi all,

I am trying to install the APM server in my personal Linux machine as I would like run Gekko optimization locally using IPOPT (to reproduce what I have in my personal Windows machine). My idea is to use "remote=True, server='http://127.0.0.1'".

I have followed APMonitor site instructions:

https://apmonitor.com/wiki/index.php/Main/APMonitorServerLinux

Apache and PHP are working property. But not success at running Gekko as not server is reached from Python.

I suspect the problem is that the git repo does not include the shared libraries required by IPOPT. Is that correct? If so, any other version of the APM server files I can use?

On the other hand, I found a potential solution:

https://groups.google.com/g/apmonitor/c/YYXjlelD5gw/m/9NdA5t9XAgAJ

It seems that Gekko "sees" the APM server. However, I get this error:

    Exception:  @error: Horizon Allocation
     ARX next horizon not associated
     See file horizon.txt

I guess the problem is that the Server files from the link are not updated.

(P.S. I tried following the instruction from the README file but all the link point to Windows installation videos)

Anybody who may help?

Bests, J

[John Hedengren]

The apm version in the archive https://github.com/APMonitor/apm_server was v0.8.5. I just upgraded the versions to v1.0.2. The latest versions can also be found in the Gekko archive (bin folder). Let me know if this helps.

 

Best regards,

 

John Hedengren

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[Jesus Febres]

Hi John,

Many thanks for your reply.

Indeed, it helps me.

However, I am still unable to use IPOPT. I suppose it is not included in the bin files.

I wonder if there is any chance (apologies if my request is rude) to get the executable with it included (for the linear solver, MUMPS would work for me).

Bests, J

[John Hedengren]

The IPOPT solver is available with remote=True on all platforms and also with remote=False on Windows. Unfortunately, I can’t distribute IPOPT local versions for other OS because those are compiled with linear solvers that need a license. Good luck with your application!

John

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From: apmo...@googlegroups.com <apmo...@googlegroups.com> on behalf of Jesus Febres <jesus....@gmail.com>
Sent: Thursday, April 28, 2022 7:24:59 AM
To: apmonitor <apmo...@googlegroups.com>
Subject: Re: [APM] [GEKKO] :: APM Linux server

 

To view this discussion on the web visit https://groups.google.com/d/msgid/apmonitor/d1c0fddb-676d-4924-ab66-59d8bc2d0320n%40googlegroups.com.