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I have recently installed Amplpy for python 3.6.5 (win 32 bit), but I am facing the following issue:

  • Please make sure that the AMPL folder is in the system search path, or specify the path via:
    AMPL(Environment('full path to the AMPL installation directory'))
RuntimeError                              Traceback (most recent call last)
<ipython-input-4-1768ae85d3ec> in <module>()
      1 from amplpy import AMPL
----> 2 ampl = AMPL()

D:\Poulad\Program\myprog\lib\site-packages\amplpy\ampl.py in __init__(self, environment, langext)
     83         if environment is None:
     84             try:
---> 85                 self._impl = amplpython.AMPL()
     86             except RuntimeError as e:
     87                 from sys import stderr

RuntimeError: AMPL could not be started: The system cannot find the file specified.

I have also added amplpy and amplpython paths to the search paths through sys.path.append() but the error is poping up again.

Would you please help me to fix the problem?

dejanualex
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Poulad
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2 Answers2

2

You have to put the path of the ampl executable when you call ampl (line 2). So instead of:

ampl = AMPL()

you write:

ampl = AMPL(Environment('put/here/your/path/'))
esperluette
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2

You have to import the Environment class from amplpy. Then you have to specify where your amplpy file is located. It should be something like that:

from amplpy import AMPL,Environment

ampl = AMPL(Environment(r'C:\ampl.mswin64'))

Md Fantacher Islam
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