Why do I get the warning "MATLAB:di​spatcher:I​nexactCase​Match Cannot find an exact (case-sensitive) match for 'startup'" on MATLAB startup?

On startup the following message is displayed: 

Warning: Executing startup failed in matlabrc. 
This indicates a potentially serious problem in your MATLAB setup, which should 
be resolved as soon as possible. Error detected was: 
MATLAB:dispatcher:InexactCaseMatch 
Cannot find an exact (case-sensitive) match for 'startup' 

The closest match is: Startup in C:\Users\timdu\Documents\MATLAB\StartUp.m

Answer 1

[MathWorks Support Team]

The startup file MATLAB searches for is case sensitive.

In order to resolve this issue, the current 'StartUp.m' file should be renamed to 'startup.m'.

Answer 2

[Bill Tubbs]

For me the problem started after I added a path to a module that I am using for a course. The scripts in this module are launched using a script called 'Startup.m' and I was told to add its directory to the Matlab path (which I did using addpath).

So, to fix it I did this:

rmpath('/Users/billtubbs/gel-7063/SimulPro')
savepath

and now I do not get the warning at startup.

Presumably the Matlab system also uses a file called 'startup.m' somewhere and therefore you must never create a file with that name and permanently add it to the path.