Home/ Questions/How to avoid the error "importerror: dll load failed: %1 is not a valid win32 application"?
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Emma Roques
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Asked: 2022-05-12T11:47:17+00:00 In:

How to avoid the error “importerror: dll load failed: %1 is not a valid win32 application”?

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Hi developer experts, I have a small but frustrating use case, and so far, I couldn’t get my head around this problem & ideal solution. I am running my command, and I am facing one problem with the importerror: dll load failed: %1 is not a valid win32 application. Below is the command I used:

Traceback (most recent call last):
File "C:\WorkSpace\Work\dev2qa.com-example-
code\PythonExampleProject\com\dev2qa\example\sqlite\SQLiteOperationExample.py", 
line 7, in <module>
import sqlite3
File "C:\Program Files (x86)\Python37-32\lib\sqlite3\__init__.py", line 23, in <module>

from sqlite3.dbapi2 import *
File "C:\Program Files (x86)\Python37-32\lib\sqlite3\dbapi2.py", line 27, in <module>
from _sqlite3 import *

When I run it, I get the following error:

ImportError: DLL load failed: %1 is not a valid Win32 application.

I am looking forward to gaining some knowledge from all experts. Thank you, guys!

dll load failed
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2 Answers

  1. Best Answer
    Expert

    The cause: This error happens because your eclipse Pydev project uses python interpreter is a 32-bit version, and your Windows OS is a 64-bit version.

    Solution: 

    Open a dos window and run the command python in it:

    C:\Users\zhaosong>python
Python 3.7.1 (v3.7.1:260ec2c36a, Oct 20 2018, 14:05:16) [MSC v.1915 32 bit (Intel)] on win32
    Run the command set pro in the dos window, you can get your Windows OS bit version.
    >set pro
PROCESSOR_ARCHITECTURE=AMD64

PROCESSOR_IDENTIFIER=Intel64 Family 6 Model 60 Stepping 3, GenuineIntel

PROCESSOR_LEVEL=6

PROCESSOR_REVISION=3c03

PROGRAMDATA=C:\ProgramData

PROGRAMFILES=C:\Program Files

PROGRAMFILES(X86)=C:\Program Files (x86)

PROGRAMW6432=C:\Program Files
PROMPT=(base) $P$G
    Remove the 32-bit python and set up another 64-bit python, then use the 64-bit version of python as your eclipse Pydev project’s python in order to fix this problem.

    How To Set 64-bit Python As Eclipse Pydev Project Used Python Interpreter.

    1. Open eclipse, click the Project —> Properties menu item on the top menu toolbar.
    2. Click the PyDev – Interpreter/Grammar item on the project Properties window left side.
    3. Click the link Click here to configure an interpreter not listed on the window right side, then it will prompt the How to config interpreter? dialog.
    4. Click the Open interpreter preferences page button, it will open the Preferences window.
    5. On the window right side, click the New button, then click the Browse for python/pypy exe item in the drop-down list.
    6. Browse to select the Python.exe file in my anaconda installed directory ( for example C:\Users\zhaosong\anaconda3 ).
    7. Give the python interpreter a name ( such as anaconda-python ).
    8. After you install the new python interpreter, you should select it for your eclipse Pydev project.
    9. You can read the article How To Change Python Interpreter In Eclipse Pydev Project To Use Different Python Virtual Environment Library to learn more.
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  2. Check that your Python version is 64-bit. This could be the problem. This would mean that you would have used 32-bit Python and installed 64-bit binaries for OpenCV.

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