fatal error on startup

fatal error on startup java exception occurred: java.lang.noclassdelfounderror: could not initialize class com.mathworks.mde.desk.mldesktop

[Baptista]

how to solve this problem

Answer 1

[Jack]

Hey Baptista,

This error usually happens when MATLAB's Java environment is corrupted or there are issues with the installation. Here are some steps to fix it:

1. Restart MATLAB as Administrator

• Close MATLAB completely.
• Right-click the MATLAB icon and select Run as administrator.

1. Reset MATLAB Preferences

• Open File Explorer and go to: C:\Users\YourUsername\AppData\Roaming\MathWorks\MATLAB

• Rename the folder matching your MATLAB version (e.g., R2023b) to something like R2023b_backup.
• Restart MATLAB and check if the issue is resolved.

1. Start MATLAB Without Java (Test Mode)

• Open Command Prompt (cmd) and run: matlab -nojvm

• If MATLAB starts, the problem is Java-related. You may need to reinstall MATLAB or check your Java installation.

1. Reinstall MATLAB

• If the issue persists, try uninstalling and reinstalling MATLAB.

Follow me so you can message me anytime with future MATLAB questions. If this helps, please accept the answer as well.