OSError: [WinError 126] The specified module could not be found

[hippolyte-dubois]

Hi, I'm trying to open a virtual output port but this error is raised when i try to do so. From the installation guide i've understand that i need portmidi.dll, but there's no download link, and google doesn't know the answer either.

Do i need to install portmidi (if i could avoid it that would be amazing, the VStudio solution is broken) or do i only need one dll ?

What do I need to do ?

[olemb]

PortMidi doesn't support virtual ports so you'll have to switch to RtMidi. Not only does it have more features but it looks like it's easier to install in Windows:

http://trac.chrisarndt.de/code/wiki/python-rtmidi/install

Once you've got it installed here's how to use it with Mido:

https://mido.readthedocs.io/en/latest/backends.html#rtmidi

[hippolyte-dubois]

"Trac Error Page python-rtmidi/install not found"

I since moved to a pygame backend with LoopMIDI to create my virtual ports. It works fine except that i get the following error : RuntimeError: pygame.midi not initialised.

I tried using mido.set_backend('mido.backends.pygame',load=True) but this error is raised : TypeError: set_backend() got an unexpected keyword argument 'load'

What am i doing wrong ?

[olemb]

Where are you getting the "Trac Error"?

Aha, you're not creating the virtual port with Mido, just connecting to it? Then any backend will do.

I'll look into adding a load argument to set_backend(). Here's a workaround if you want the module loaded right away:

mido.set_backend('mido.backends.pygame')
mido.backend.load()

(If you don't load the module it will be loaded when you start using it.)

[hippolyte-dubois]

I'm getting the Trac Error when going to http://trac.chrisarndt.de/code/wiki/python-rtmidi/install

Yes, that's why I chosed pygame, easier to install.

I added the load() instruction, but still, same error. Full trace : Exception ignored in: <bound method BasePort.__del__ of <open output 'Wi-Micro_1' (Pygame/b'MMSystem')>> Traceback (most recent call last): File "C:\Users\Hippolyte\AppData\Local\Programs\Python\Python35-32\lib\site-packages\mido\ports.py", line 74, in __del__ File "C:\Users\Hippolyte\AppData\Local\Programs\Python\Python35-32\lib\site-packages\mido\ports.py", line 70, in close File "C:\Users\Hippolyte\AppData\Local\Programs\Python\Python35-32\lib\site-packages\mido\backends\pygame.py", line 95, in _close File "C:\Users\Hippolyte\AppData\Local\Programs\Python\Python35-32\lib\site-packages\pygame\midi.py", line 431, in close File "C:\Users\Hippolyte\AppData\Local\Programs\Python\Python35-32\lib\site-packages\pygame\midi.py", line 98, in _check_init RuntimeError: pygame.midi not initialised.

[olemb]

Wow, there's a space at the end of the Trac URL for some reason. Try this:

http://trac.chrisarndt.de/code/wiki/python-rtmidi/install%20

I think you need to install pygame.midi separately, but I'm not sure. (I've only ever used Mido on Linux and Mac.)

What happens if you do:

import pygame.midi

[olemb]

Hi,

I hope you've found a solution to this.

Looking over your issue now I realize that somehow I misread the error message. I though it said "pygame.midi not installed" while it clearly says "pygame.midi not initialised".

This should work:

pygame.midi.init()

[cjappl]

@IgorDubois Has this issue been solved? There has been no action for some time

[cjappl]

Moving to close stale issue