diff --git a/plugins/org.eclipse.wst.validation/validate/org/eclipse/wst/validation/internal/operations/ValidationBuilder.java b/plugins/org.eclipse.wst.validation/validate/org/eclipse/wst/validation/internal/operations/ValidationBuilder.java
index aae7122..61666ed 100644
--- a/plugins/org.eclipse.wst.validation/validate/org/eclipse/wst/validation/internal/operations/ValidationBuilder.java
+++ b/plugins/org.eclipse.wst.validation/validate/org/eclipse/wst/validation/internal/operations/ValidationBuilder.java
@@ -212,6 +212,7 @@
 			Set<ValidatorMetaData>  set = new HashSet<ValidatorMetaData>();
 			set.addAll( Arrays.asList( enabledValidators ) );
 			for (IProject p : referenced) {
+				if (!p.exists())continue;
 				ProjectConfiguration refProjectCfg = ConfigurationManager.getManager().getProjectConfiguration(p);
 		
 				ValidatorMetaData[] refEnabledValidators = refProjectCfg.getEnabledFullBuildValidators(true, false);
diff --git a/plugins/org.eclipse.wst.validation/vf2/org/eclipse/wst/validation/internal/MarkerManager.java b/plugins/org.eclipse.wst.validation/vf2/org/eclipse/wst/validation/internal/MarkerManager.java
index ddd2cf5..5c61529 100644
--- a/plugins/org.eclipse.wst.validation/vf2/org/eclipse/wst/validation/internal/MarkerManager.java
+++ b/plugins/org.eclipse.wst.validation/vf2/org/eclipse/wst/validation/internal/MarkerManager.java
@@ -57,7 +57,12 @@
 		
 		String id = validator.getMarkerId();
 		if (id != null){
-			resource.deleteMarkers(id, true, IResource.DEPTH_ZERO);
+			try {
+				resource.deleteMarkers(id, true, IResource.DEPTH_ZERO);
+			}
+			catch (CoreException e){
+				// Nothing that we can do. This is not worth logging.
+			}
 			return;
 		}