Problem when launching Matlab 2019

I have just downloaded Matlab toolbox and I think I did a mistake somewhere but don't know where. I have two versions of Matlab on my machine and I when I launch Matlab 19, the one I want to use, I get this two lines as a kind welcome:

> Unable to resolve the name slreq.utils.loadLinkSet.

> Error in rmiml.getAll

When I run the first section, which is merely

    clear all; close all; clc;

I get this error

> Cannot find builtin function '_LiveEvaluate'

I really don't know what happened and how I could solve it. I have checked the environment variables and they seem okay... This is really stange (and annoying)

Thanks in advance for your help

Answer 1

[Jan Studnicka]

Does this help?

>> rehash toolboxcache

>> restoredefaultpath

If so, there is probably an issue with your paths. Try to call

>> which pathdef -all

and check this doc page:

Path Unsuccessfully Set at Startup

[De Handschutter Pierre]

This is not working unfortunately. When I run the whole script (without doing by section), I have this error occuring

Attempt to execute SCRIPT mrdivide as a function:

C:\Program Files\MATLAB\R2019b\toolbox\matlab\ops\mrdivide.m

Error in Sandbox (line 25)

X=1/2*eye(n);

I really don't understand what happens

[Jan Studnicka]

I suggest you contact technical support for your region:

https://www.mathworks.com/support/contact_us.html