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Why is the MATLAB path cleared when I try to add a directory using the PATHTOOL or ADDPATH functions in MATLAB 7.0 (R14)?

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MathWorks Support Team
编辑： MathWorks Support Team 2023-4-16
When I use the PATHTOOL function to add a path to my directory, the path listing becomes blank and MATLAB can no longer find any functions. This also happens when I try to use the ADDPATH function to add a directory. For example, the following commands:
addpath('c:\')
path
result in the following error:
ERROR: ??? The path may be bad. Please save your work (if desired), and quit.
When using PATHTOOL, the directory listing goes blank.

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MathWorks Support Team
编辑：MathWorks Support Team 2023-4-16
This bug has been fixed for Release 14 SP1 (R14SP1). For previous releases, please read below for any possible workarounds:
This has been verified as a bug in MATLAB 7.0 (R14) in the way that MATLAB handles an environmental variable called ICU_DATA on the system PATH.
For information about how to resolve this issue, see the following solution:
https://www.mathworks.com/matlabcentral/answers/101460-why-am-i-experiencing-problems-with-the-international-components-for-unicode-icu-libraries-in-matl

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