cyipopt: Windows 10 x64 ImportError: DLL load failed - location issue or binary compatibility issue?
System info:
- using Python 3.7.2 official installation
- have VS2019 build tools (cl.exe prints
Microsoft (R) C/C++ Optimizing Compiler Version 19.21.27702.2 for x86
)
Steps taken:
- used the latest master branch of cyipopt (0.2.0-dev0), and downloaded the linked Ipopt binary versions
- python setup.py install runs fine
...Finished processing dependencies for ipopt==0.2.0.dev0
- however,
import ipopt
prints
>python
Python 3.7.2 (tags/v3.7.2:9a3ffc0492, Dec 23 2018, 23:09:28) [MSC v.1916 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import ipopt
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "C:\Users\...\AppData\Local\Programs\Python\Python37\lib\site-packages\ipopt-0.2.0.dev0-py3.7-win-amd64.egg\ipopt\__init__.py", line 43, in <module>
from cyipopt import *
ImportError: DLL load failed: The specified module could not be found.
- some DLLs are in this location
>ls C:\Users\...\AppData\Local\Programs\Python\Python37\Lib\site-packages\ipopt-0.2.0.dev0-py3.7-win-amd64.egg
EGG-INFO IpOptFSS.dll __pycache__ cyipopt.py msvcp100.dll
IpOpt-vc10.dll Ipopt-vc8.dll cyipopt.cp37-win_amd64.pyd ipopt msvcr100.dll
Debugging so far:
- I have so far looked through https://github.com/matthias-k/cyipopt/issues/21 as well as searched through all the issues in this repo for DLL and looked through the solutions.
- Is this due to a mismatch in the C compiler that produced the Ipopt binaries and the one that compiled cyipopt on my system? If so, is there a way to know which compiler was used for that, or any link to instructions for recompiling Ipopt?
- Potentially #41 would alleviate this problem
About this issue
- Original URL
- State: closed
- Created 4 years ago
- Comments: 15 (6 by maintainers)
The instructions are here:
https://github.com/matthias-k/cyipopt#from-source-on-windows
But maybe need a little improvement.