Hello Team. I try use the comand 'syms', but received this error.... Can my help please?

>> syms x
f = -2*x/(1+x^2)^2;
int(f)
Error using mupadmex
Internal error with symbolic engine. Quit and restart MATLAB.

Error in symengine

Error in sym (line 185)
        symengine;

Error in sympref>implementedSymprefs (line 142)
   y = {'FourierParameters', sym([1,-1]), 'MuPAD', 'sym';...

Error in sympref (line 81)
  iSymprefs = implementedSymprefs;

Error in syms (line 199)
calledFromBase = mupadmex('', 8);

Warning: Failed to initialize symbolic preferences. 
> In syms (line 199) 
Error using mupadmex
Internal error with symbolic engine. Quit and restart MATLAB.

Error in sym>tomupad (line 1219)
    S = mupadmex(numeric2cellstr(x));

Error in sym (line 211)
                S.s = tomupad(x);

Error in syms (line 201)
toDefine = sym(zeros(1, 0));

[Jan]

Please mention, if you followed the advice given in the message already: Quit and restart.

Answer 1

[Walter Roberson]

This can also be a symptom of https://www.mathworks.com/matlabcentral/answers/399991-syms-sym-and-mupad-functions-cause-matlab-to-freeze

[Guilherme Lopes de Campos]

Thank you for answer, Seems to me that many user's Matlab to be with the problem. Only in the next update will be tidy? Best Regards,

[Jan]

@Guilherme Lopes de Campos: "Next update"? This update is available since 14-May-2018. See https://www.mathworks.com/matlabcentral/answers/399991-syms-sym-and-mupad-functions-cause-matlab-to-freeze#comment_570801

You did not answer, if quitting Matlab and restarting it helped.

[Guilherme Lopes de Campos]

Thank you Jan, Quitting and Restarting not helped,

I am downloading the update 2.

Thank the Community Matlab by the Help

Best Regards,

Answer 2

[Guilherme Lopes de Campos]

Problem Solving Community,

Thank you for all

:)