MATLAB: MigratePref.txt problem

MATLABmigratepref - matlab 2018b

matlab command prompt display this message: 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:165) at com.mathworks.util.PostVMInit.perform(PostVMInit.java:196
Why? I check migratePref and is empty. That is why that message is shown. How do I solve this error?

Best Answer

Try renaming the file C:\Users\BrendanM\AppData\Roaming\MathWorks\MATLAB\R2018a\matlabprefs.mat to something else and try again.
Please refer to a similar case on MATLAB answers here: https://www.mathworks.com/matlabcentral/answers/397603-how-do-i-fix-this-error-on-matlab-startup-java-lang-illegalargumentexception-file-migratepref-txt
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