I have a win7 64 bit operating system.  I’m trying to install the usb midi driver to use with my rack es and kx88 keyboard.  Both require the same driver.  I’m following the installation instructions EXACTLY as printed but get a 25009 error.  I found another thread where a guy had to wipe out all his midi drivers and start over. I do NOT want to do this as I have a fairly complex setup and wiping out other drivers is not a very elegant solution.

Is there another way to get around this error and get the driver installed?

Thanks,

-Rich

The error is a Windows report that you have too many instances of a MIDI driver installed. This can happen when you plug devices into different ports on your computer - in order to make driver usage ‘easy’ - Windows goes and find the driver information and each time you plug a device into a different port, it reinstalls the driver for the new port. Eventually you meet up with the Windows limit of MIDI drivers.

Deleting an instance of it in the REGISTRY is not catastrophic, because Windows will reinstall it automatically if and when you need it (remember they are trying to make it ‘easy’)… Of course editing your Registry (if you are not certain about what you are doing) can be scary - but you simply have to find the right information and delete the duplicates.

In general, to avoid this, you should always plug your MIDI devices into the same ports… this way Windows has the driver ready for that port and does not have reinstall it.

I do not find any articles that specifically address Windows 7 64-bit and this issue. But this is a common issue for Windows dating back to XP. It’s an old windows problem that is now finding its way to a third OS…

You can search the internet for information (maybe you’ll be luckier than I was on finding an easier fix for Windows 7 64-bit) I’d tell you to ask Microsoft but that may or may not get you the solution. MIDI is a four letter word to computer folks (lol)

The problem is you have multiple instances (unnecessarily) of some MIDI driver already installed… when you navigate to the spot in the registry you will see them: midi, midi1, midi2, midi3, midi4, midi5, midi6 and so on… you only get ten

Delete them.. it sounds like it a severe thing to DELETE them, but remember in the registry they get restored as necessary… you plug in a USB device, the computer will recognize it (bing-bong), it then goes to the driver area, finds the appropriate driver and “registers” it for that port - which pops it back in the registry.

Thanks for the detailed response, and for trying to find a solution prior to posting.  I’m aware of the midi limitations in Windows and the havoc that can cause.  I’m also aware of plugging and unplugging stuff into different usb ports causes drivers to be reinstalled.  To avoid this, all of the usb ports coming out of the back of the computer terminate in a panel on my console of labeled usb ports.  Each is labeled for a specific device.  Plugging and unplugging is MUCH easier this way.

After my posting, I successfully installed another midi keyboard (a Korg Kontrol 49) with no error messages.  So clearly I had not reached the limit of midi devices (in fact I have 7).  Nevertheless I continued to receive the 25009 error when installing the Yamaha USB midi driver. BTW, I had never installed the Yamaha usb driver before - I’d always used the midi ports. This pretty much told me all I needed to know.

I’ve been a Yamaha fan for 30 years, but frankly, my experience with Yamaha software has been disappointing to say the least. Their drivers have always been dodgy in my experience and the mlan stuff was a nightmare. Yamaha software products can be great, but their fault-tolerance level is on a hair-trigger and things can crash at the slightest provocation. 

To avoid countless hours trying to resolve software issues, I keep good, working HD clones in various states.  To solve my problem, I simply went back to my “basic install” and built a new DAW quickly.  I was able at that point to install the Yamaha USB midi driver. 

Again, thanks for the help, Phil.  I love my rack ES too much to not get things up and running :).

-Rich