ImportError: DLL load failed: %1 is not a valid Win32 application. But the DLL's are there

Question

I have a situation very much like the one at ImportError: DLL load failed: %1 is not a valid Win32 application, but the answer there isn\'t working for me.

My Python

Answer 1

For me the problem was that I was using different versions of Python in the same Eclipse project. My setup was not consistent with the Project Properties and the Run Configuration Python versions.

In Project > Properties > PyDev, I had the Interpreter set to Python2.7.11.

In Run Configurations > Interpreter, I was using the Default Interpreter. Changing it to Python 2.7.11 fixed the problem.

Answer 2

First I copied cv2.pyd from /opencv/build/python/2.7/x86 to C:/Python27/Lib/site-packeges. The error was

"RuntimeError: module compiled against API version 9 but this version of numpy is 7"

Then I installed numpy-1.8.0-win32-superpack-python2.7.exe and opencv works fine.

>>> import cv2
>>> print cv2.__version__
2.4.13

Answer 3

Unofficial Windows Binaries for Python Extension Packages

you can find any python libs from here

Answer 4

I had the same problem. Here's what I did:

1. I downloaded pywin32 Wheel file from here, then

2. I uninstalled the pywin32 module. To uninstall execute the following command in Command Prompt.

   pip uninstall pywin32

3. Then, I reinstalled pywin32. To install it, open the Command Prompt in the same directory where the pywin32 wheel file lies. Then execute the following command.

   pip install <Name of the wheel file with extension> Wheel file will be like: piwin32-XXX-cpXX-none-win32.whl

It solvs the problem for me. You may also like to give it a try. Hope it work for you as well.

Answer 5

I copied cv2.pyd file from /opencv/build/python/2.7/x86 folder instead of from /x64 folder to C:/Python27/Lib/site-packeges. I followed rest of the instructions provided here.

Added by someone else, not verified: I also copy file cv2.pyd to folder C:/Python27/Lib/site-packages/cv2. It works.

Answer 6

So I had problems installing vtk under windows (as I use python 3.7 there is no binary available so far just for older python versions pip install vtk is not working)

I did wrote python in my cmd:

Python 3.7.3 on win32

So I now know I have python 3.7.3 runing on a 32 bit.

I then downloaded the correct wheel at VTK‑8.2.0‑cp37‑cp37m‑win32.whl

Next I instlled that wheel:

pip install VTK-8.2.0-cp37-cp37m-win32.whl

Then I tested it and it worked:

python
import vtk