sym x returns error symbolic math toolbox is installed

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Hao Sun 2019-11-5

评论： Walter Roberson 2023-3-21

x = sym('x')

Error using sym (line 186)

Invalid MEX-file 'C:\Program Files\MATLAB\R2019a\toolbox\maple\maplemex.mexw64': Missing dependent shared libraries:

'maplecr.dll' required by 'C:\Program Files\MATLAB\R2019a\toolbox\maple\maplemex.mexw64'

'icudt61.dll' required by 'C:\Program Files\MATLAB\R2019a/bin/win64\icuuc61.dll->C:\Program

Files\MATLAB\R2019a/bin/win64\icuin61.dll->C:\Program Files\MATLAB\R2019a/bin/win64\libmwi18n.dll->C:\Program

Files\MATLAB\R2019a/bin/win64\libmwfl.dll->C:\Program Files\MATLAB\R2019a/bin/win64\libmex.dll->C:\Program

Files\MATLAB\R2019a\toolbox\maple\maplemex.mexw64'

Error in syms (line 47)

assignin('caller',varargin{1},sym(varargin{1}));

Walter Roberson 2019-11-5

You appear to be using a 32 bit version of Maplesoft's MATLAB Connector package to interface between MATLAB and Maplesoft's maple product.

If you want to use the maple software package as your symbolic package inside MATLAB, then you will need a 64 bit version of it. The 64 bit version of icudt61.dll is just named icudt.dll ; see https://www.mathworks.com/matlabcentral/answers/488651-need-icudt61-dll-when-using-vlfeat-in-matlab-2019a#answer_399265

If you want to use Mathwork's MuPAD based symbolic package, then in MATLAB use pathtool to remove all references to maple