PyCharm and amplpy do not recognize license

[s.dar...@gmail.com]

Hello,

I just got a one-month I have replaced the ampl.lic, which is clear from the creation date [1]. I'm testing the PATHSolver ("pathampl") with amplpy - and the license test does fail [2]. This is on the system where I created the fingerprint.

I am on Ubuntu, and it works if I run my python file via the command line. If I run it within pyCharm, the aforementioned failure occurs.

Thanks

[1]:
-rw-rw-r--  1 saman saman      683 Oct  2 15:59 ampl.lic
-rw-r--r--  1 saman saman      505 Oct 27  2016 ampl.lic.backup

[2]:
Path 4.7.04: 1404 side inequalities:
    1404 simple bounds,
    0 range bounds,
    0 single inequality constraints, and
    0 range constraints.
Path 4.7.04 (Mon Apr  4 08:51:43 2016)
Written by Todd Munson, Steven Dirkse, and Michael Ferris

Demo license: size restriction of 300 variables or 2000 nonzeros exceeded.

[Filipe Brandão]

The value of the environment variable PATH when python is run from the command line appears to be different from the value when you run the program in pyCharm; this value is usually modified in '~/.bashrc' and the changes only apply to the console. In order to avoid this behavior you should add the folder containing the AMPL license to the environment variable PATH as follows:

import os
os.environ['PATH'] = '/path/to/the/license/folder'+':'+os.environ['PATH']
from amplpy import AMPL

You can also compare the value of the environment variable PATH in the console (echo $PATH) with the value of os.environ['PATH'].

Best regards,
Filipe Brandão

[Robert Fourer]

Also keep in mind that PATH uses its own license mechanism, not AMPL's ampl.lic file.  To avoid the "Demo license: size restriction ..." message, you have to set an environment variable specifically for the PATH license string, following the directions at http://pages.cs.wisc.edu/~ferris/path/LICENSE.  Perhaps PATH is not seeing that setting when run within PyCharm.

Bob Fourer
am...@googlegroups.com

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