RE: Help with problem "Custom model error: string > 1500 characters"
John Hedengren
Lenka,
I’m not getting the same error that you received. What text editor are you using? Please consider using one of the text editors listed here:
http://apmonitor.com/wiki/index.php/Main/SyntaxHighlighting
Both gEdit and Notepad++ have syntax highlighting. I changed your model slightly to add some values for t[48:347]. You may want to check that this is correct. The first error that I received was that t[49] was not defined.
! t[48] = x[48]^2
! t[49:53] = 0
t[48:347] = x[48:347]^2
You should be able to copy this model into the web-interface:
http://apmonitor.com/online/view_pass.php
and click the green arrow and it solves with a successful solution result. I you want to tap into a community of users, please consider joining the APMonitor Google Groups discussion forum.
Best regards,
John Hedengren
---------- Forwarded message ----------
From: Lenka Caletková <calet...@gmail.com>
Date: Sun, May 5, 2013 at 7:30 AM
Subject: Help with problem "Custom model error: string > 1500 characters"
To: sup...@apmonitor.com
Hello,
I am a student of electro-technical faculty at CTU in Prague( Czech Republic) and i am working with your optimization software. I am trying to solve one optimization problem and i alway get this error: "Custom
model error: string > 1500 characters
Consider breaking up the line into multiple equations"
May I ask, where is the problem? Because I controlled all the possibilities, that there is more than 1500 characters in one line and i didn't find it. Please can you help me, where could be the problem? It is really important for me, because I want to use this software for my bachelor thesis. I add the apm file to this email. Thank for reading this and I am looking forward for the answer.
Best regards,
Lenka Caletkova
--
John Hedengren
Lenka,
You model file was ending each of the lines with a “CR” character. Are you using a MacOS up to OS 9.0? The more recent MacOS computers use LF like Linux. Here is some additional help on CR and LF:
http://en.wikipedia.org/wiki/Newline
APM normally requires LF to detect new lines. I’ve attached a version that is in Windows format with CR and LF at the end of each line. You can see newline characters in Notepad++ by Selecting “View”…”Show Symbol”…”Show End of Line”.
You’ll want to look for the LF indication at the end of each line.
I’ve attached a copy of your files that should work now.
-John Hedengren
From: Lenka Caletková [mailto:calet...@gmail.com]
Sent: Tuesday, May 07, 2013 2:52 AM
To: John Hedengren
Subject: Re: Help with problem "Custom model error: string > 1500 characters"
Dear John,
first I want to say big thanks to you, that you answered me, because I was really desperate. I did all, what you have told me and in the
http://apmonitor.com/online/view_pass.php it works everything properly. But I am writing a program in python language and there i get the problem more than 1500 character per string. So I just want to
ask, if this structure is okay:
#server
s = 'http://xps.apmonitor.com'
# application + random number
a = 'zk' + str(randint(2,999))
#clear server
apm(s,a,'clear all')
#load model
apm_load(s,a,'quad24.apm')
#change solver
apm_option(s,a,'quad24.solver',3)
#solve
output = apm(s,a,'solve')
print output
#retrieve solution
(csv, solution) = apm_sol(s,a)
print csv
Thanks a lot for your answer and wish you a beautiful day!
Best regards,
Lenka C.
#open root file
apm_web_root(s,a)
#open solution in web browser
apm_web_var(s,a)
2013/5/6 John Hedengren <john_he...@byu.edu>