Unable to install MATLAB Support Package for Apple iOS Sensors

While trying to install the iPhone and iPad sensor support package I get the following error:

When I run version -java I get:

>> version -java

ans =

'Java is not loaded'

Has anyone encountered this?

Answer 1

[Adarsh]

Hi @Nicolás,

I understand that you are encountering an error indicating "Java is not loaded" when running "version -java" in MATLAB R2025b. This typically occurs when MATLAB starts without the Java Virtual Machine (JVM) initialized, which is required for many features including hardware support package installation.

To resolve this issue you can try the following steps:

First, restart MATLAB and verify whether Java is loaded by running this command:

usejava('jvm')

If this returns 0 (false), Java is not loaded. Ensure that you are not starting MATLAB with the "-nojvm" flag in your startup options or shortcuts.

Next, try using the "jenv" factory command to configure MATLAB to use the version of Java included with the installation:

jenv factory

This command resets MATLAB to use its bundled Java environment, which should resolve most Java loading issues.

If the "jenv" factory command does not resolve the issue, you can manually enable Java in MATLAB R2025a and newer versions by referring to this MATLAB Answer:

https://www.mathworks.com/matlabcentral/answers/2179665-how-can-i-enable-java-in-matlab-r2025a-and-newer

For changing the Java Virtual Machine that MATLAB uses on Windows, please refer to:

https://www.mathworks.com/matlabcentral/answers/130359-how-do-i-change-the-java-virtual-machine-jvm-that-matlab-is-using-on-windows

To configure the Java path for MATLAB, MATLAB Runtime, and deployed applications, refer to:

https://www.mathworks.com/matlabcentral/answers/2162010-configure-java-path-for-matlab-matlab-runtime-and-deployed-applications

If you need to install a compatible version of Java separately, you can find the supported OpenJDK versions here:

https://www.mathworks.com/support/requirements/openjdk.html

Additionally, please verify that MATLAB was not installed without the default JRE. You can check this by referring to:

https://www.mathworks.com/matlabcentral/answers/1455629-how-can-i-install-matlab-without-the-default-jre

If none of these steps resolve the issue, reinstalling MATLAB with the default Java environment is recommended.

If the default java does'nt work, you can try setting up MATLAB with external java environment as mentioned above by installing the compatible version of Java for the MATLAB version that you are using.

I hope this helps!