Reaper does not want Maschine MiKro MK3 as midi controller

In the Reaper control panel of Option (Preference), I can not activate Maschine MiKro MK3. I have this error message: "The following MIDI inputs could not be opened: Maschine Mikro MK3".
This problem happened suddenly. I do not understand why.
If anyone can help me it would be very nice.
Thank you so much.

 

Does the controller function in stand alone and can you give us a screenshot mac or pc

 

I tried again but Reaper does not take Maschine Mikro as controller.
In Standalone, sometimes in Maschine's preferences, I can not activate the Mashine Mikro MK3 box. The problem is not systematic. He is random. Sometimes it works, sometimes it does not work.

I thought the problem may also come from the PC. I do not really know where to look to resolve a midday conflict.

 

sorry for the tardy reply did you try rebooting your pc and rebooting the Maschine, also are you using the official native instruments midi cable my maschine and my a series both hate third party cables

 

I was in the very same situation before, until I plug my Mikro MK3 directly onto my desktop WITHOUT using an USB hub, and with the original cable, hope it works for you too.

 

I use a work around before though, run Maschine software within reaper, then route midi out from the maschine track, this is actually even better since you can enjoy all the functions of Mikro MK3 which is not available while using midi mode