"syms", "sym", and "mupad" functions cause MATLAB to freeze

Why does MATLAB hang when I try to use the "syms", "sym", or "mupad" functions?

It causes MATLAB to run indefinitely, the system freezes and memory usage increases.

Sometimes errors also appear:

Error using mupadmex

Internal error with symbolic engine. Quit and restart MATLAB.

Error in symengine

Error in sym (line 185)

symengine;

Answer 1

[MathWorks Support Team]

This is a known bug that exists in certain Windows 10 builds. It has been fixed as of MATLAB R2018a Update 1 and MATLAB R2017b Update 7.

Here is the bug report below for more information:

https://www.mathworks.com/support/bugreports/1755918

As far as we know, only MATLAB R2017b and R2018a are affected. Older releases are not affected by the Windows 10 Spring 2018 update.

[Karel Peeters]

Where can I download this update? Checking for updates within Matlab says I'm up-to-date, and I can't find a download on the site.

[Fran Alderisio]

Update: https://uk.mathworks.com/downloads/web_downloads/show_updates?release=R2018a

How to install: https://uk.mathworks.com/content/dam/mathworks/mathworks-dot-com/support/updates/r2018a/r2018a-updates-install-instructions.pdf

[Carlijn Bouwmeester]

Hi, I had the same problem and when I tried to install the update, it says update failed and I get a list of warnings, I'm not sure what to do.

[Kapa Kudaibergenov]

Did you solve it? Cause I have the same problem

[Edgar Brito]

I have the same problem too. At moment nobody to get a help a solution.

[Lucinda Burn]

I have this problem, I'm on 2018a and I've checked for updates and I'm all up-to-date. Can you provide any advice?

[Jane Li]

I also have the same problem, and I checked for any recent updates. When I run a simple command using syms (for example: syms x diff(x^2) ) MATLAB just runs forever, and when I try to pause it, it gets stuck in unpausing mode forever.

[Enrico Canuto]

Same condition with Matlab 2017b, symbolic tool 8.0, and Windows 10 Pro

[Laura Hild]

If you are still having issues after following the instructions in the EBR linked above, please contact Technical Support.

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

Answer 2

[Syed Riza]

Thank you very much for the updates. Sticking in the middle of programs was very annoying.

Answer 3

[Derrick Gao]

So bad !!!!!!!!!!It takes me one night to find the reason !!!!!!!!!!!!!!and forced to restrat my laptop many times