MATLAB: Error in symbolic engine with latest R2018a Trial

errorsymbolic

I was running example in Symbolic Math Toolbox. I got following errors. Please help.
Trial>> pi/6 + pi/4
ans =
      1.3090
Trial>> sym(pi/6) + sym(pi/4)
Error using mupadmex
Internal error with symbolic engine. Quit and restart MATLAB.
Error in sym>symr (line 1321)
[S,err] = mupadmex(' ',x,3);
Error in sym>numeric2cellstr (line 1262)
                S{k} = symr(double(x(k)));
Error in sym>tomupad (line 1219)
    S = mupadmex(numeric2cellstr(x));
Error in sym (line 211)
                S.s = tomupad(x);
Error in sympref>implementedSymprefs (line 142)
   y = {'FourierParameters', sym([1,-1]), 'MuPAD', 'sym';...
Error in sympref (line 81)
  iSymprefs = implementedSymprefs;
Error in symengine
Error in sym (line 185)
        symengine;
Warning: Failed to initialize symbolic preferences. 
> In symengine
  In sym (line 185) 
Error using mupadmex
Internal error with symbolic engine. Quit and restart MATLAB.
Error in symengine
Error in sym (line 185)
        symengine;

Best Answer

I had the same problem. After the latest Windows update the symbolic engine doesn't work. You have to download the Matlab R2018a Update 1, click below.
https://es.mathworks.com/support/bugreports/search_results?utf8=%25E2%259C%2593&search_executed=1&keyword=Internal+error+with+symbolic+engine&release_filter=Exists+in&release=0&selected_products=&commit=Search
Hope that helps!
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