GWT Compilation Error - IncompatibleClassChangeError

Question

When compiling the project, I get this obscure Exception

Looking for precompiled archives.  To disable, use -Dgwt.usearchives=false
Loading archived module: jar:         


        

Answer 1

In my project, a modular GWT application, I had to add a dependency to gwt-dev into the module that started the whole app.

    com.google.gwt
    gwt-dev
    provided