< Back to IRCAM Forum

OM problem to launch on Windows

Hi, yes, it’s in.

Everything is in C: (not D:/ or other external device ?)

Did you try to uninstall / re-install ?

Yep, did all that, and everything is on C

Do you have a previous version of OM working on this computer?
If yes, you could try to copy OMAudioLib.dll from there.
Otherwise you can get in in the archive section of the download page.

No it’s the last version and I had no other one.

you can get OM 6.12 for Windows here: http://forumnet.ircam.fr/shop/fr/archived.php?id_product=43&archived=1

I’m having the same problem in windows 10.
I installed om6.15 from
The OMAudioLib.dll is there but it doesn’t work. Also the link of the last post is gone.
Best regards,


Dear rc

here is a recompiled omaudiolib for windows 10 (untested on windows 10 - because i don’t have it).
Now , remove the old omaudiolib to somewhere else, and replace it with this. I hope it will run.

OMAudioLib.zip (524.8 KB)

PS: I will see if i can do the same with the SDIF ddl when i can get my hands on the sources.

Thanks for the file. I tried it but I still have the same error message.
best regards,

Is OM 6.15 installed on C:\ ?

Dear rc,

If you tried the new omaudiolib, you can set back the old one. I assume it is not an om issue, but this should come from your windows installation. It could be:
1- Do yo have a MEAN anti-virus installed ?
2- Did you check your system for viruses ?
3- Are you administrator of your machine ?
4- As Jean says, is OM installed on your C:// Volume ?

(sorry for the late reply. I haven’t got any notification about this topic)
I made a clean install of windows 10 ltsc 2019. No viruses were found.
Yes, installed in C: as an administrator.
Is there a way to test system compatibility or possible install errors?
Where can I get old versions of omaudiolib?
best regards,

Have you tried to just re-run the installer ?
The problem here seems to be that the file OMAudioLib.dll is not found (and same for your sdif.dll)



Just installed latest version windows 10 64bits, and i can confirm, the dlls are not recognized. Even if we re-install OM, and certainly when the correct location is present.
Will continue investigation.


Thanks for testing it. I hope there’s an easy fix for this one.
Best regards,

Just a note: the distributed OM 6.15 for Windows, as well as all linked libraries, are 32-bits. In principle this should be no problem, as Windows 64 supports both 32 and 64 bits programs, but this is something to be aware of, for instance if you recompile some of the dependencies.

Believe you had a similar problem with the description above:
I am using Windows 8.1 64bit, after some experiments with OMAudioLib.dll for C: \ Windows \ SysWOW64, with this message it did not appear anymore. However, another error occurs for the one that found no solution
I did not find any files related to “openAudioManager”. Is this error related to the absence of OMAudioLib.dll in the OM directory?


“(sorry for the late reply. I haven’t got any notification about this topic)”.
Please, check your notification status here:


Hi WillianBilli,

Thanx for the feedback. However you are not supposed to move the OMAudioLib.dll out from the Om folder. That’s why you are getting the last error concerning openAudioManager which is a call to a function in the dynamic lib.
Our guess it is a problem with the lib compilation which works under certain processors and nit with old ones. can you tell us which processor you have on your machine?
As soon as we have a windows station working (we are missing one), we will get to the task to see that this lib works on most of 64 bit processors.


1 Like

Hi haddad,
Thanks for the feedback and attention!
My processor is really old (intel duo core), but last year, I managed to install version 6.15 on this same machine without any problems. However, I had to format the computer and took the opportunity to install the new version (6.16). After formatting, even version 6.15 stopped working. There has been no hardware change since the first successful installation.
For this reason, I believe that Windows Update stopped making some update automatically, this would explain the fact that the previous installation was successful, but this is just a guess. And if so, you would need to find out which update needs to be performed manually.
I’ve done the test of installing OM before any windows update, the difference is that other dlls are missing. In this test without any Windows update I had to manually install the following dlls:
All of these errors were easily resolved, except for the OMAudioLib.dll error.
If there is a problem in the lib compilation there is a possibility to work around this problem something that was in the operating system before formatting.