Hey Guys,
I picked up an MPK249 keyboard today, and I can't, for the life of me, get it to work with anything in Win 10.  In Sonar, it shows up as a choice for midi input, but when I try to select it, I get a "memory full" message.  On other programs, it shows up, and in some cases just won't let me check the box to use as midi input, and in other cases I just get an error message when I try to use it.  
I've done a factory reset for both global and preset.  Any help would be greatly appreciated. 

Hi,
A tad late but better late than never :P
"Memory full" afaik is related to the device being used in another program, that was the case for me anyways.
Close all programs and then try to use it in Sonar (check in task manager that everything is closed just in case).
 
Hope this helps.