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We recommend to use a dedicated Eclipse (Eclipse for RCP and RAP Developers - at least Eclipse version 3.7.1, since Java 7 is needed!) for Odysseus with its own workspace, because there are some configurations that are predefined for a workspace location that is equal to the trunk folder. Therefore, if you firstly started eclipse, you have to choose the trunk folder as the workspace location. Thus, choose the same folder which you used for the checkout and contains subfolders like ac, core, cep etc.
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