Profiler will not open

Until recently I did not have any issues with opening and running the Profiler on matlabR21b, however, since last week I have not been able to open it, there is always a window that opens and it looks like Profiler is loading and starting, but it never loads fully and I can not click on it and use it. I tried also donwloading and isntalling the version R22a and the problem persists. I also restarted my computer and matlab numerous times.

[Jan]

"there is always a window that opens and it looks like Profiler is loading and starting, but it never loads fully" - please explain with more details, how you start the profiler and what you observe.

[Hana Krakovská]

I click on the profiler and a new blank window on the taskbar with the name Profiler opens. But I can not click on it, nothing is shown and also when I try to close matlab it complains about running processes so it seems like it is trying to open it somehow but not succeeding.

Answer 1

[Jan]

Maybe a user-defined function shadows a function used to start the profiler. Try https://www.mathworks.com/matlabcentral/fileexchange/27861-uniquefuncnames to identify shadowed toolbox functions. Do not insert folder with user-defined functions on top of the path but at the bottom.

Try restoredefaultpath (which should remove all user folders from the path - create a backup of pathdef.m before).

Removing the profile directory helps some times, but you tried to install a new Matlab version and this should create a new user folder and preferences files also.

[Hana Krakovská]

thanks, I will try that later and let you know.

[Hana Krakovská]

So I tried running the function, but I do not understand what path should I put there. I ran it without input just in my current path and it outputed a long file. Part of it is here:

-- pathdef:

C:\Users\Hana\Documents\MATLAB\pathdef.m

C:\Program Files\MATLAB\R2022a\toolbox\local\pathdef.m

-- slblocks:

C:\Program Files\MATLAB\R2022a\toolbox\simulink\blocks\sb2sl\slblocks.m

C:\Program Files\MATLAB\R2022a\toolbox\simulink\blocks\slblocks.m

C:\Program Files\MATLAB\R2022a\toolbox\stateflow\stateflow_lib\slblocks.m

C:\Program Files\MATLAB\R2022a\toolbox\comm\commutilities\slblocks.m

C:\Program Files\MATLAB\R2022a\toolbox\daq\daqblks\slblocks.m

C:\Program Files\MATLAB\R2022a\toolbox\dsp\dsputilities\slblocks.m

..................

In the output, there is not mentioned profiler anywhere so I guess this won't be a problem. The restoredefaultpath function also does not help.

Any other advices? When I run it, only thing that is shown is a window with the name Profiler on the taskbar, but I can not even click on the window to open it.

[Jan]

@Hana Krakovská: The important output of the tool to check collisions are the functions, which exist as user-defined functions and in Matlab's toolbox also. This would most likely not be the profiler.m function itself, but a subfunction called by the profiler.

Are you working with admin privileges? Then it is possible to destroy a function of Matlab's toolbox functions by accident. If this was the case, the secure method to solve this is a re-installation of Matlab and avoiding to work with admin privileges.

What happens if you press Ctrl-C during the profiler is in idle mode?

Do you have folders in your path, which are stored on a network or cloud drive?

How long did you wait?

[Hana Krakovská]

Dear Jan, thank you for your help. In the meantime I had some windows updates after which it still did not work, but now I reinstalled everything once again and it magically works. I do not still understand what was the issue. Matlab asked me to install some additional sub-program, something to do with C and C++ compiler, so I do not know if that could have been the original problem.