On 24.05.2012 14:59, David Virdefors wrote: What's with the "at at" ? Anyway, I cleaned up and copied the stack trace to github:gist. The cleaned up stack trace is available at https://gist.github.com/2781498 Looking at line 47 of that gist, you can see that org.eclipse.osgi.internal.loader.BundleLoader is being used to load foo.RCPAppender which fails. Can you make foo.RCPAppender available to BundleLoader?

Hi, here is the rest of the stack trace: 14:14:04,991 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - About to instantiate appender of type [foo.RCPAppender] 14:14:04,992 |-ERROR in ch.qos.logback.core.joran.action.AppenderAction - Could not create an Appender of type [foo.RCPAppender]. ch.qos.logback.core.util.DynamicClassLoadingException: Failed to instantiate type foo.RCPAppender at ch.qos.logback.core.util.DynamicClassLoadingException: Failed to instantiate type foo.RCPAppender at at ch.qos.logback.core.util.OptionHelper.instantiateByClassName(OptionHelper. java:54) at at ch.qos.logback.core.util.OptionHelper.instantiateByClassName(OptionHelper. java:32) at at ch.qos.logback.core.joran.action.AppenderAction.begin(AppenderAction.java: 54) at at ch.qos.logback.core.joran.spi.Interpreter.callBeginAction(Interpreter.java :276) at at

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