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How do I fix this error on Matlab startup? java.lang.​IllegalArg​umentExcep​tion: File migratePref.txt should only contain 'T' or 'F'!

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Brendan Murphy
Brendan Murphy on 26 Apr 2018
Commented: Walter Roberson on 26 Apr 2018
This error also appears when using the Application Compiler
java.lang.IllegalArgumentException: File migratePref.txt should only contain 'T' or 'F'!
java.lang.IllegalArgumentException: File migratePref.txt should only contain 'T' or 'F'!
at com.mathworks.services.Prefs.readMigrateFlag(Prefs.java:2196)
at com.mathworks.services.Prefs.createTwoWayMapPrefsSettings(Prefs.java:375)
at com.mathworks.services.Prefs.<clinit>(Prefs.java:213)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:264)
at com.mathworks.util.PostVMInit$StartupClass.init(PostVMInit.java:161)
at com.mathworks.util.PostVMInit.perform(PostVMInit.java:237)
Warning: Initializing MATLAB Graphics failed.
This indicates a potentially serious problem in your MATLAB setup, which should be resolved as soon as possible. Error detected was:
MATLAB:load:unableToReadMatFile
Unable to read MAT-file C:\Users\BrendanM\AppData\Roaming\MathWorks\MATLAB\R2018a\matlabprefs.mat. File might be corrupt.
> In hgrc (line 163)
In initprefs (line 11)
In matlabrc (line 94)
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