Midi Keyboard working intermittently in Sonar Platinum Producer

Do you have USB Power Management disabled?

Do you use the M-Audio Driver?

I use an M-Audio Keystation Pro 88 without issue here.

I have the same intermittent frustrating problem with my EMU X Board 49 under USB.. Was working fine, then used again after a couple of weeks break. nothing seemed to work.. swapping ports etc...USB power management is disabled.. I ended up uninstalling via device manager and reinstalling and it was ok. I used to use EMU's X board drivers with Win 7 .. but Win 10 installs it as plug and play.. Don't have a sound card with midi ports at the moment so don't know if all is well using midi interface.

There are only 2 problems I have experienced with USB devices:
1) if you connect the same device to different ports. Even in case that has happened once by mistake. Sonar does not like that. Use Windows device manager with "show hidden devices" set to uninstall ALL instances of that device.
2) bad USB cable/hub. There is zero diagnostic, but the software/drivers are rarely handle errors correctly. The result is unpredictable. F.e. I have a mouse which disconnects/reconnects all the time. Apart from periodical problems with clicking, I could not notice that till I have tried to use it with my own driver...
 

Using a hub is not recommended.

If you use the MIDI ports on the Key Station Pro you will not see it named, only the MIDI ports of the MIDI interfaces you have.  In this case you need to remember what MIDI port you have it plugged in to and then select that in CbB or alternately rename the port on your device it is connected to using a friendly name in Preferences > MIDI > Devices. 

You will also have to use an external PSU do not under any circumstances have the USB connected and the external PSU it will destroy your Keystation Pro.

It almost reads like Input Echo is not enabled

1.  Input echo is enabled (remember it worked once, saved project, reopened project and did not work).
2.  Deleted %APPDATA%\Cakewalk\<Sonar version>\TTSSEQ.INI.  No cigar.
3.  Deleted every device for fast track ultra and or midi from audio inputs and outputs,  software devices, sound video and game controllers, and anything I could find remotely applicable (did this several times). No cigar.
 
I also tried this on two different computers.
 
Here is something else interesting - On the off chance that I am getting input from my keyboard, if I save the project and reopen it, it still works, but if I close and reopen Sonar it no longer registers inout from the keyboard.
 
Still open to suggestions...

The synth I am testing with has midi output enabled.
Not sure about drum maps defined.  I have never used that feature.  I am testing with SI Electric Piano so I am not sure what drum maps have to do with it. 
What I am trying to understand is why it works (sometimes) on a new project until I close and reopen either the project or Sonar.
Pardon my ignorance but I am not sure what CbB is referring to. 
I am using Sonar Platinum, 23.10.0 Build 14.  I have been using Sonar since version 8.  I like it and really don't to switch. Just frustrated because my Keystation was working fine until the update right before Bandlab acquired Cakewalk.
 
 
 
 

AllenKahn
The synth I am testing with has midi output enabled.
Not sure about drum maps defined.  I have never used that feature.  I am testing with SI Electric Piano so I am not sure what drum maps have to do with it. 
What I am trying to understand is why it works (sometimes) on a new project until I close and reopen either the project or Sonar.
Pardon my ignorance but I am not sure what CbB is referring to. 
I am using Sonar Platinum, 23.10.0 Build 14.  I have been using Sonar since version 8.  I like it and really don't to switch. Just frustrated because my Keystation was working fine until the update right before Bandlab acquired Cakewalk.

CbB is Cakewalk by Bandlab. It is essentially Sonar Platinum core program, but it is getting updates.
 
Another question: what you enabled in the MIDI devices preferences? I hope nothing except the port to which the keyboard is connected.
Try to disable Synth MIDI output.
 
I know that sounds like make no sense, but all that does... Cakewalk enumerate all MIDI into one array (real inputs, Synth outputs, Drum maps) and when something is "shifted" (stuck/disappear/appear/etc.) they not always reposition things correctly.
Previous CbB update has fixed something in that area (as they claim).
 

Hi folks, this same problem has been driving me crazy for months now! I’ve got an Oxygen 49 and 88. I never seem to have problems with the 88 but the 49 is always intermittent. I always assumed it was a windows problem and have trawled the internet for usb fixes but nothing seems to have worked. I’ve uninstalled everything, devices and software, reinstalled it all again and everything is fine for a short time. Then out of the blue I open up CbB or Platinum and there’s nothing coming from my 49. It’s so frustrating and I’m about to give up on lot. :(

I’m going to try some of the suggestions here and see what happens. It’s good in one way I suppose to know that it’s not just me having this problem. I thought I was going nuts! :)

Cheers

Hi Jon
 
Sorry, I didn't want to hassle anyone so didn't think to post any major details, I was just glad to see it wasn't just me having this problem :)
 
I'm on windows 10, fully updated. I have used the 88 an 49 attached to the computer at the same time and not had problems in the past. I'm not using a usb hub, both are straight into usb ports on the back of the pc, which is an i7. Lately I have just had the 49 left plugged in. 
 
To show how intermittent the problem is, yesterday afternoon the input failed on the 49 after about 30 minutes of playing. Usually I have to go into devices in sonar, uncheck the 49 from the list, restart CbB (or platinum) go straight to devices and recheck the 49 and everything seems ok again. Except yesterday this didn't work at all. No matter how many times I did this CbB just wouldn't get any signal from tge 49. After half an hour trying I gave up and shut the pc down.
 
Last night I went back to it, turned the pc on and opened up CbB. The 49 was still checked in devices after the afternoon antics and it was working perfectly. I played for a couple of hours without a single problem! 
 
I think it's either a windows problem or maybe as simple as a cable problem. Think I'll pick up a new cable and see what happens in the future.
I understood the 49 is plug and play and didn't need any drivers installed to use it.
It's brand new, only had it a couple of months so not sure on firmware. How would I check or update firmware on the keyboard?
 
Thanks for listening anyway :)
Cheers

Nifty9993 I'm not using a usb hub, both are straight into usb ports on the back of the pc,

still worth checking what else is sharing that usb hub/controller (internally) and that the power management is configured right