can't use monetdblite on windows (winerror 126)

[erwinvink]

After installing monetdblite with pip on a windows 10 machine, I'm not able to use monetdblite. when running a python file with only the following text: import monetdblite, I'm getting the following error:

Traceback (most recent call last): File "C:/data_analytics/cryptobazen/main/monetdblite_test.py", line 5, in <module> import monetdblite File "C:\data_analytics\cryptobazen\virt_env\lib\site-packages\monetdblite\__init__.py", line 13, in <module> from monetdblite import connections File "C:\data_analytics\cryptobazen\virt_env\lib\site-packages\monetdblite\connections.py", line 7, in <module> from monetdblite import cursors File "C:\data_analytics\cryptobazen\virt_env\lib\site-packages\monetdblite\cursors.py", line 8, in <module> from monetdblite import embeddedmonetdb File "C:\data_analytics\cryptobazen\virt_env\lib\site-packages\monetdblite\embeddedmonetdb.py", line 32, in <module> libs[0]), mode=ctypes.RTLD_GLOBAL) File "C:\Users\Erwin\AppData\Local\Programs\Python\Python36\lib\ctypes\__init__.py", line 348, in __init__ self._handle = _dlopen(self._name, mode) OSError: [WinError 126] The specified module could not be found

I've tried it on several windows computers but none of them worked. Visual C++ is not the problem. All needed packages are installed. Running on Linux is no problem.

I tried debugging the path where this dll should be located, it looks fine. dll is in place. Tried to put the path to the dll hardcoded to avoid any errors in this, same error. Also tried to run dependency checker on the dll file, no missing dependencies found. Is this a known issue? What can I do?

[hannes]

@MarkRaasveldt windows builds are still unsolved, right?

[pakdev]

Correct. pip installing this module is definitely broken as it's only bundled with libmonetdb5.so, and I can't successfully build this project with mingw32-make. With some changes to the Makefile, I was able to compile successfully, but linking fails.

[ssi-bilal]

Has this issue been resolved yet? We are facing this same error even today.

[hannes]

Please file this there: https://github.com/MonetDB/MonetDBLite-Python

[ssi-bilal]

Please file this there: https://github.com/MonetDB/MonetDBLite-Python

Sure, Hannes. I'll file the issue there. I just wanted to make sure that was anything done on it so far. Because I saw your comment from last year to Mark i.e.

@MarkRaasveldt windows builds are still unsolved, right?

[hannes]

It should be working these days. Check with @kutsurak ?

[kutsurak]

It is working (wheels install correctly and the test suite passes) for 64 bit installations and for Python >= 3.5. Unfortunately I have not been able to compile successfully for 32 bit versions or for Python 2.7.

[ssi-bilal]

I was able to install monetdblite finally after up installing the Visual C++ Build tools. Steps I took:

1. pip install monetdblite" was not working and giving errors
2. I cloned from git using: "git clone https://github.com/hannesmuehleisen/MonetDBLite-Python.git"
3. Executed following statement: "python setup.py install"
4. It installed with many warnings
5. I executed python
6. entered command at python shell: "import monetdblite"
7. I got following error:

[kutsurak]

Moved at: https://github.com/MonetDB/MonetDBLite-Python/issues/38