hello list,

I am a new user of wicket and try to make a simple fileupload like the
example at http://www.wicket-library.com/wicket-examples/upload/

The examples work when I deploy to tomcat on win xp.
However when I use the war on linux ( e.g. Apache Tomcat/6.0.18 | suns
java 1.6.0_10-rc2-b32 | Linux | 2.6.27-5-generic | i386) and try to
upload a file in the browser, I get the following, titled Unexpected
RuntimeException:

WicketMessage: Method onFormSubmitted of interface
org.apache.wicket.markup.html.form.IFormSubmitListener targeted at
component [MarkupContainer [Component id = ajax-iconUpload]] threw an
exception

Root cause:

java.lang.IllegalStateException: Attempt to set model object on null
model of component:
page:footer:pluginRepeater:0:plugin:ajax-iconUpload:fileInput
at org.apache.wicket.Component.setDefaultModelObject(Component.java:2965)
[...]

Any idea what is happening, any hints?

greetings

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