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[交流] matlab为什么不能进行符号计算？已有1人参与

我安装的matlab软件为什么不能进行符号运算呢？也不认syms命令，比如在命令行窗口输入。会有如下提示、请虫友解答一下，谢谢！

sym a,b
??? Error using ==> sym
License checkout failed.
License Manager Error -8
Make sure the HostID of the license file matches this machine, and that the HostID on the SERVER line matches the HostID of the license
file.

Troubleshoot this issue by visiting:
http://www.mathworks.com/support/lme/R2010a/8

Diagnostic Information:
Feature: Symbolic_Toolbox
License path: C:\Users\ThinkPad\AppData\Roaming\MathWorks\MATLAB\R2010a_licenses;C:\Program
Files\MATLAB\R2010a\licenses\license.dat;C:\Program Files\MATLAB\R2010a\licenses\license_DESKTOP-I1I5TGU_161051_R2010a.lic;C:\Program
Files\MATLAB\R2010a\licenses\license_DESKTOP-I1I5TGU_888888_R2010a.lic;C:\Program Files\MATLAB\R2010a\licenses\network.lic
FLEXnet Licensing error: -8,130.