java.io-problems

Since MATLAB v. 2017, as well as in my recent v.2018a, I get "complains" each time as I run the MATLAB. Namelly:

java.io.FileNotFoundException: C:\Users\Home\AppData\Roaming\MathWorks\MATLAB\R2018a\matlab.prf (Отказано в доступе)
  at java.io.FileOutputStream.open0(Native Method)
  at java.io.FileOutputStream.open(FileOutputStream.java:270)
  at java.io.FileOutputStream.<init>(FileOutputStream.java:213)
  at java.io.FileOutputStream.<init>(FileOutputStream.java:162)
  at com.mathworks.services.Prefs.save(Prefs.java:632)
  at com.mathworks.services.Prefs$SavePrefsThread.run(Prefs.java:1343)
java.io.FileNotFoundException: C:\Users\Home\AppData\Roaming\MathWorks\MATLAB\R2018a\matlab.prf (Отказано в доступе)
  at java.io.FileOutputStream.open0(Native Method)
  at java.io.FileOutputStream.open(FileOutputStream.java:270)
  at java.io.FileOutputStream.<init>(FileOutputStream.java:213)
  at java.io.FileOutputStream.<init>(FileOutputStream.java:162)
  at com.mathworks.services.Prefs.save(Prefs.java:632)
  at com.mathworks.services.Prefs$SavePrefsThread.run(Prefs.java:1343)
java.io.FileNotFoundException: C:\Users\Home\AppData\Roaming\MathWorks\MATLAB\R2018a\matlab.prf (Отказано в доступе)
  at java.io.FileOutputStream.open0(Native Method)
  at java.io.FileOutputStream.open(FileOutputStream.java:270)
  at java.io.FileOutputStream.<init>(FileOutputStream.java:213)
  at java.io.FileOutputStream.<init>(FileOutputStream.java:162)
  at com.mathworks.services.Prefs.save(Prefs.java:632)
  at com.mathworks.services.Prefs$SavePrefsThread.run(Prefs.java:1343)

What's the reason, and how to remove these?

[Guillaume]

Does the directory C:\Users\Home\AppData\Roaming\MathWorks\MATLAB\R2018a\ exist on your computer?

Answer 1

[Yevgeny Gayev]

Dear Guillaume, thanks for your reply! Yes, directory C:\Users\Home\AppData\Roaming\MathWorks\MATLAB\R2018a does exist on my computer! As well as directory C:\Users\Home\AppData\Roaming\MathWorks\MATLAB\R2018a_licenses

I saw there also all my previous MATLAB-versions. What these shoud mean, then?