STM32CubeProgrammer execute fail with Could not find or load main class com.st.app.Main

[Acui.1]

Hi all, I'm new to STM32 and I encountered with an error when I run STM32CubeProgrammer after installing the tool on Ubuntu 18.04 according to STM UM2237 user manual

the error is : Could not find or load main class com.st.app.Main.

I googled and it was said that it might be the CLASSPATH config problem which leads to the class cannot be found. But I searched the install path which is /home/mypath/STMicroelectronics/STM32Cube/ and cannot find any JAVA class looks like this main class(only 3 JAR file found: uninstaller.jar, OpenJFXWarning.jar and STLinkUpgrade.jar), and I even don't know which path to add to CLASSPATH.

Does anyone have ideas about why this happened and how to fix it, thanks in advance.

[MTorr.3]

They could always do like they did with STM32CubeMonitor-RF and provide a bundled jre8 with all of their dependencies. That would be nice...

https://docs.oracle.com/javase/8/docs/technotes/guides/deploy/self-contained-packaging.html

[MTorr.3]

Curiously enough, after installing the Oracle JRE8 I get a popup message with:

```

CubeProgrammer_API or one of its dependencies is missing. Please try

reinstalling the program or check your java architecture.

​```

However, if I try to reinstall using the Oracle JRE8 it fails, complaining of a non existing file (it looks like the installer is trying to`chmod` a file before copying it).

So there's that, can't upgrade the stm32wb55 with the provided software.

Here's an alternative:

https://github.com/stlink-org/stlink

Most Linux distributions with a package manager should have that with the names:

• libstlink1
• stlink-gui
• stlink-tools

if not you can build it from source.

Cheers!

[FOrtn.1]

I found a solution for Ubuntu 20.04 here:

https://stackoverflow.com/a/62198111

Installing deb package "Liberica Full JRE 8u252+9 x86 64 bit for Linux" worked for me getting CuboProgrammer starting on Ubuntu 20.04.

[MTorr.3]

I can confirm this also works with Debian Buster and Bullseye. Although I also see some exceptions while running the app, it still runs.

Thanks! =)

[TMast.1]

Works voor lubuntu 18.04

Thank you FOtn.1 !!!

[MMatj.1]

Thanks for FOtn.1 !!

Works with bellsoft-jdk8u265+1-linux-amd64-full.deb on Linux Mint 20 Cinnamon .

[FLACO.1]

Hi,

To make it work with the bundled openjfx package, you may edit the bin/STM32CubeProgrammer and add your openjfx path and modules :

java --module-path /usr/share/openjfx/lib --add-modules javafx.controls,javafx.fxml,javafx.web -jar $DIR/STM32CubeProgrammerLauncher

[FBusy.1]

I used openjfx-15 solved this problem,download openjfx-15_linux-x64_bin-sdk.zip from https://openjfx.io/​, unzip to somewhere(such as :/usr/opt/),then modify the program startup file(${Program installation directory}/bin/STM32CubeProgrammer),may need sudo ,replace the last line "java -jar $DIR/STM32CubeProgrammerLauncher" with "java --module-path /usr/opt/javafx-sdk-15/lib --add-modules=javafx.base --add-modules=javafx.fxml --add-modules=javafx.graphics --add-modules=javafx.media --add-modules=javafx.swing --add-modules=javafx.web --add-modules=javafx.controls -jar $DIR/STM32CubeProgrammerLauncher", "/usr/opt/javafx-sdk-15/lib" is your openjfx's path, and my javasdk is jdk11, I also tried jdk12, also worked well.

[FM.1]

On Ubuntu 22.04, installed using default paths (version 1.1.1). Then define this in ~/.bashrc

alias stm32-monitor-power='$HOME/STMicroelectronics/STM32CubeMonitor-Power/jre/bin/java -jar $HOME/STMicroelectronics/STM32CubeMonitor-Power/STM32CubeMonitor-Power.jar'

To start use:

stm32-monitor-power