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Exception when starting Developer Studio

Former Member
0 Kudos

Hi there,

I just installed the latest sneaky version and when I try to start my Dev. Studio, i get the following exception:

!ENTRY org.eclipse.core.launcher 4 0 oct 09, 2005 21:34:29.30

!MESSAGE Exception launching the Eclipse Platform:



at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(

at sun.reflect.DelegatingMethodAccessorImpl.invoke(

at java.lang.reflect.Method.invoke(

at org.eclipse.core.launcher.Main.basicRun(


at org.eclipse.core.launcher.Main.main(

Caused by: java.lang.reflect.InvocationTargetException



... 7 more

Caused by: org.eclipse.swt.SWTException: Failed to execute runnable (java.lang.NoClassDefFoundError: org/eclipse/debug/ui/actions/AbstractLaunchToolbarAction)

at org.eclipse.swt.SWT.error(

at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(

at org.eclipse.swt.widgets.Display.runAsyncMessages(

at org.eclipse.swt.widgets.Display.readAndDispatch(

at org.eclipse.swt.widgets.Display.release(




... 8 more

It looks like a classpath issue, but i set my classpath properly (I do have Eclipse 3.1 running also, and works properly, so that my path is well set)

Does anybody know how to fix this?

thank you very much and best regards

Accepted Solutions (0)

Answers (3)

Answers (3)

Former Member
0 Kudos

Hi Jacoba

This is a proxy error.

This is a known problem that appears due to an implementation bug,

while trying to read the proxy information. The studio expects non-

empty value for key com.tssap.config/proxy, located in


ugin_customization.ini file. During the installation no value is

assigned to this key (as you mentioned - no proxy in your case). The

problem will be fixed for SP14, however there is a workaround:

1. Change the value for key com.tssap.config/proxy in

plugin_customization.ini to something like this - proxy:80.

2. After this change the DevStudio should start and you'll be able to

configure your proxy settings from Menu Window->Preferences-

>Workbench->Proxy Settings. (In your case - disable the proxy




Former Member
0 Kudos


There are latest version NWDS 13/14 try to install any one of them.Make sure you have JDK 1.4.8 version installed before installing NWDS.

Hope this solved your problem.



Former Member
0 Kudos

My first impression is that you've got a corrupted installation (class org/eclipse/debug/ui/actions/AbstractLaunchToolbarAction is missing). Try reinstalling the application.