# AspectJ declare error and declare warning statements in the Visualiser

If a project contains any errors or warnings caused by AspectJ "declare error" or "declare warning" statements, these will show up in the Visualiser as red and yellow stripes respectively. If the aspect that declared a particular error or warning is unchecked in the menu, the corresponding stripe will not be shown. You can also hide all declared errors and/or all declared warnings using the icons on the toolbar of the Visualiser Menu view.

AspectJ perspectives

Visualizing the effects of aspects on a project
AspectJ declare error and declare warning statements in the Visualiser
Navigating with the Visualiser
Using the Visualiser outside the Aspect Visualization perspective