This Message Seems Not to Make Any Sense!! (To me anyway)

Check the outputs carefully. You may be hearing a send and not an out.

I too have had this problem on EVERY project I work on.  Usually as I go on with my project more and more tracks and busses show this error.

I have checked and checked and everything appears to be properly outputing.  I have chalked it up to a bug and have made the INI setting so that I don't have to be bothered with that stupid error message any longer.

Noel Borthwick [Cakewalk
]

The warning is there to tell you that some send or output in your project is assigned to a bus who's destination is "None"  or that a send or output itself is assigned to None.
We put that warning in some years ago because of frequent user confusion as to why they couldn't hear the output of some tracks or sends. As such it provides a drgree of troubleshooting complex projects.

You can solve it by tracking down the offending send or bus and either removing it or assigning the tracks to something that is not dead. Or you can silence the warning permanently by the ini file. I'm curious what the case is for intentionally assigning something to NONE?
I have thought about force assigning a silent output to "something" but that seems a more risky choice since if a track has something loud on it and its routed to a destination that is a headphone mix for example it could be unpleasant :)

I like it just the way it is now. Please don't change it. It alerts me about where I may have put an out when I had different equipment. I have not run across a false positive. 

I see thanks for clarifying. I doubt its a spurious warning. The check is pretty simple and is determined by checking for any outputs routed to NONE that have tracks or buses that send to it.
If someone has a file that produces this try removing each element one at a time and resave to see which one produces the warning. I've never seen a case where it was not indeed something caused within the project.

I'm curious what the case is for intentionally assigning something to NONE?

I have done this - though rarely - when using a bus specifically for spectral monitoring of multiple tracks with SPAN. IOW, routing signals to a bus for some purpose other than audible output, wherein a plugin is the final destination.

I agree with John and think it's just fine the way it is now. It would be nice, though, if the warning including a checkbox saying "don't tell me again for this project". That would be safer, I think, than a global setting telling it to never warn.

I downloaded a mixing template from a user on here, several years ago. That has a "Sub master" buss that uses a "None" output and sends to a left & right buss instead.

Still use it to this day. I don't see a warning though as I use the variable in the ini file mentioned by Johnbouy.

I've run into that problem when I've deleted a bus and replaced it with another. No tracks were set to output to "none", but I got the message anyway..  It's rare but I have gotten this. I've learned to think long and hard about creating a buss..!

Noel
 
You're absolutely correct on this, and........
 
I have to buy Scott G's book on X1 desperately!
 
This program is so unlike 8.5.3 it's a bit wierd that we call it "Sonar" at all IMHO.
 
Anyway....
 
I went to the Inspector View and "inspected" my track from which the message originated.
 I learned that by pressing one of the two arrows directly under the "Effects Bin" to the left of the word "Send" I could see a representation of the busses assigned to that track and changes that could be made to each on the Bar right below the next level of buttons containing the,  Number of Bus, "Post" On and Off Button, and the "On and Off" button, respectively.
As I clicked these arrows I could see each assigned Effect on the bus.
I continued to click the down arrow and eventually  saw the word "None"!
Ah Ha!
I changed the "None" to  my Master Bus to the tracks in question , closed and reopened the project and the message was gone!
 
Solved!!
 
But wait!!
 
Remember the Number right below the arrows that changes each time you click the arrow that represents the individual Busses created?
 
Well.....
 
It changed until it reached the number 6.  ("so what",  you say?)
Well... I only created "4" Busses!!
 
Can that be explained as well?? (I'm sure it can)
 
I hate learning curves that have learning curves!