Error messages on launching of MATLAB and Simulink

I got following kind of message in command window on the launch of MATLAB and simulink

Cannot create file migratePref.txt!

java.io.IOException: The system cannot find the path specified

at java.io.WinNTFileSystem.createFileExclusively(Native Method)

at java.io.File.createNewFile(File.java:1012)

at com.mathworks.services.Prefs.readMigrateFlag(Prefs.java:2153)

at com.mathworks.services.Prefs.createTwoWayMapPrefsSettings(Prefs.java:373)

at com.mathworks.services.Prefs.<clinit>(Prefs.java:214)

at java.lang.Class.forName0(Native Method)

at java.lang.Class.forName(Class.java:264)

at com.mathworks.util.PostVMInit$StartupClass.init(PostVMInit.java:156)

at com.mathworks.util.PostVMInit.perform(PostVMInit.java:187)

Cannot write to preference file "matlab.prf" in "C:\MATLAB_preferences ".

Check file permissions.

Cannot write to preference file "matlab.prf" in "C:\MATLAB_preferences ".

Check file permissions.

Cannot write to preference file "matlab.prf" in "C:\MATLAB_preferences ".

Check file permissions.

The desktop configuration was not saved successfully

Cannot write to preference file "matlab.prf" in "C:\MATLAB_preferences ".

Check file permissions.

>> simulink

An error was encountered while saving the command history

java.io.FileNotFoundException: C:\MATLAB_preferences \History.xml (The system cannot find the path specified)

at java.io.RandomAccessFile.open0(Native Method)

at java.io.RandomAccessFile.open(RandomAccessFile.java:316)

at java.io.RandomAccessFile.<init>(RandomAccessFile.java:243)

at com.mathworks.mde.cmdhist.AltHistoryCollection$CommandSaver.run(AltHistoryCollection.java:1214)

at java.lang.Thread.run(Thread.java:748)

Cannot write to preference file "matlab.prf" in "C:\MATLAB_preferences ".

Check file permissions.

>>

Database operation order error in . (unknown) (IN DIAGNOSTIC OF SIMULINK)

Please advise the step wise solution in detail. that how can I fix the problem. The abovesaid links are not understandable to me.

[Walter Roberson]

Duplicates https://www.mathworks.com/matlabcentral/answers/472648-message-appearing-on-start-of-the-matlab-2019a