Posted by geko on 2015-10-07 01:41

I’m having the same issue trying to debug GPIO_IOToggle example for the Nucleo-F401.

> An internal error occurred during: “Launching STM32F4xx-Nucleo Debug”.
> java.lang.NullPointerException

Any help would be appreciated.

BTW, my Java version is 1.7.0_79

And here’s my logs:

SESSION 2015-10-06 11:53:01.065 -------------------

eclipse.buildId=4.4.2.M20150204-1700
java.version=1.7.0_79
java.vendor=Oracle Corporation
BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=en_US
Framework arguments: -product org.eclipse.epp.package.cpp.product
Command-line arguments: -os win32 -ws win32 -arch x86_64 -product org.eclipse.epp.package.cpp.product

....

ENTRY org.eclipse.core.jobs 4 2 2015-10-06 17:17:50.175

MESSAGE An internal error occurred during: “Launching STM32F4xx-Nucleo Debug”.

STACK 0

java.lang.NullPointerException
at fr.ac6.mcu.debug.launching.MCUGdbLaunch.createOpenOCDProgramProcess(MCUGdbLaunch.java:141)
at fr.ac6.mcu.debug.launching.MCUGdbLaunch.addOpenOCDProcess(MCUGdbLaunch.java:67)
at fr.ac6.mcu.debug.launching.MCUGDBJtagDSFLaunchConfigurationDelegate.launch(MCUGDBJtagDSFLaunchConfigurationDelegate.java:98)
at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:885)
at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:739)
at org.eclipse.debug.internal.ui.DebugUIPlugin.buildAndLaunch(DebugUIPlugin.java:1039)
at org.eclipse.debug.internal.ui.DebugUIPlugin$8.run(DebugUIPlugin.java:1256)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)

Posted by milos.stankovic on 2015-10-08 10:47

I have the same problem. I can open workspace, import projects, edit files, compile and build binary files, but I cannot program STM32F7 board from Eclipse. I get following error within Eclipse:
An internal error occurred during: “Launching STM32746G_DISCOVERY Debug”.
java.lang.NullPointerException.

My colleague has exactly the same problem on his laptop computer. We can use binary files to program the board, but only from STM32-Link Utility application and everything works ok. Many people mentioned bad xml files in project directory. We inspected all of them and found nothing suspicious.

Is there a way around this problem? Basically, everything works except Program & Debug from Eclipse. We found solution for programming, but Debugger won’t run.

Posted by diabolo38 on 2015-10-10 16:20

Nucleo f401 is supported and it should work out of the box with latest ac6 (cubemx 4.1+) that’s sure.
make sure to have stlink-v2 recent driver installed (what should be the case if ou have installed stm32-uitlity)
if you installed the toolset from st pakage re-installing or updating from eclipse using the site may help
http://www.ac6-tools.com/Eclipse-updates/org.openstm32.system-workbench.site

With first earlier verison of CubeMX “board” was not set by defautl in ac6 c/c++ setting pane this making a null execption
f trying to create a debug config or launching debug, simply select a nucleo-f401re board should sollve the sisue
the same is lilkley to occur if you do not set the board in your c/c++ target ac6 setting.

Is the stm32f7 device and board cfg already supported by openocd shiped or insatlled with your ac6 plugin ?
Double check in the debug configuration and our the opencocd console (if possible) what’s the cfg file use in openocd
that file should exist on the opencd board/ or scripts subdir.