Why do I receive multiple warnings and errors when matlab starts?

I installed Matlab on a new Win 10 laptop. Now when I start Matlab I receive every time multiple warnings about nonexistent directories, like

"Warning: Name is nonexistent or not a directory: C:\Program

Files\MATLAB\R2019b\toolbox\matlabxl\matlabxl",

and then hundreds of them.

I do not have these directories as far as I can see, but what these warnings mean? Is my installation successful? If no, what is the reason? If yes, why are all these warnings?

At the end I even get an error in the Command Window

"Unrecognized function or variable 'matlab.internal.addons.updates.getSupportPackageUpdates'",

and three pop-up error windows, one with the message above and two with "An unexpected error has occured".

Why does a fresh, out-of-box installation produce these warnigns and errors, and how should I install Matlab to avoid them?

Answer 1

[Walter Roberson]

You have a few possibilities:

1. Install the Excel Add-In in order to provide the matlabxl files; or
2. go into pathtool and remove all lines that refer to matlabxl; or
3. restoredefaultpath; rehashtoolboxcache; savepath

[Artem]

Thanks Walter. This warning message was just an example. I have planty of them from compiler SDK to big data. I am not even sure if they are all in my licence. So, it does not seem like a solution. I will probably try the last approach. But my main question is why all this happens with the comercial software, what can be a reason, and how can I assure a smooth installation? I update Matlab regularily and I do not want to look every half year what I need to do to make Matlab running properly. After all the company pays a quite substantial licence fee.

[Walter Roberson]

When you install a new version of MATLAB that is no more than two releases newer than the previous version, then MATLAB will pull out the preferences and path file from the most recent previous installation and update all MATLAB release references to the new version. That works fine provided that you install at least as many toolboxes as before, but leads to these kinds of messages when your new installation has fewer toolboxes.

[Artem]

Thanks Walter. The first sentence of my question says that it was a new laptop. Do you suggest that Matlab saves some settings on own servers?