I used to be able to hit "M" on my keyboard and insert a marker into a piece. Even though my key bindings in preferences still show that "M" is bound to "Insert Marker" it has stopped working. This happens on new as well as old files. I can go to "view markers" and insert a marker just fine but that is several extra clicks. SONAR Platinum is up-to-date. Any ideas? Thanks.

Just loaded up a dummy project and the M shortcut still works for me. Sorry I can't be of more help.

Thanks. I even tried unbinding and rebinding. I tried binding to a different key. Nothing has worked to add a marker except using the "Insert Marker" dialog. Kind of frustrating because sometimes I need to insert markers "on the fly". I appreciate the input, though. Other keybindings work just fine. It's so weird. There must be a conflict somewhere but I can't find it.
 
Hopefully someone else will propose a solution! Help!

try reloading the key binding M and restart sonar

Hi Chuck - I tried that and it was a no-go. I will try a system reboot and see if it works. Thanks.

System and SONAR reboot not successful. "M" key binding will not insert marker.

Well...solved (I think). In Preferences>Keyboard Shortcuts I unbound (un-binded) "M" to "Insert Marker" and restarted SONAR. On re-opening SONAR and without re-binding "M" to "Insert Marker" the shortcut works. I am assuming Cakewalk made it part of the most recent update BUT "M" is not marked as "reserved" in my Key Binding dialog so there was no way to know what was happening. Thanks to all who explored this issue with me!

Very interesting! Sherlock Holmes would be proud of you.
 
I wonder if SONAR won't recognize an overwrite of a "factory" keyboard command, even if it's the same command. 

Hi Craig, Yes, it was weird one. Some keys like "R" and "W" and others are marked "reserved" in the Key Binding box but "M" was not and I had bound it to "Insert Marker". Anyway - seems fixed!

I just installed 2016.12 and I have a problem also with insert marker, but it's different from yours. For many years I've had F11 assigned to insert marker, because it's quicker to find than the M key. With this new version I can't get this key binding to work. I even tried assigning it to F2 and F12. None of them will work, yet I can use F2, F11, and F12 for "insert measures".
 
 
I think also for many years the M key has been assigned to insert marker, in fact in key bindings I see that M is assigned to insert marker by default. So I have the opposite problem, I'm having to train myself to use the M key instead of F11. Something strange must be going on with insert marker to have created 2 different problems.