How do I fix the amplpy error on search path?

Question

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?

Answer 1

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/'))