# Xpand Nature and Xpand Builder

You have seen in the last screenshot that you can switch the Xpand nature on. If you do so, you enable analyzer support for all Xpand specific file types in that project.

### Problem markers

During the build process, all found problems are marked in the editors as well as listed in the Problems view.

In the current implementation analyzes take place when Eclipse runs an incremental or full build. That means, problem markers are actualized when a file is saved, for instance. If you are in doubt about the actuality of problem markers, you should clean your project and let it rebuild again.

Note that if you change signatures of e.g. extensions the referencing artifacts (Xpand templates, etc.) are not analyzed automatically.