I just updated Eclipse Oxigen to Eclipse Java EE IDE for Web Developers. Version: Oxygen.3 Release (4.7.3) From there, a project that had no errors, is indicated in the project browser with an error mark, but only at the root, there is no other error mark in the folders to locate where it is. In the deployment does not mark error or any warning. Despite this, it works fine, access the database deployed on a local wildfly server. I am worried that as I move forward in development this will cause me problems. Thanks for your help! Greetings