diff --git a/plugins/org.eclipse.wst.validation/validate/org/eclipse/wst/validation/internal/ValidatorMetaData.java b/plugins/org.eclipse.wst.validation/validate/org/eclipse/wst/validation/internal/ValidatorMetaData.java
index 90da739..6b26bf6 100644
--- a/plugins/org.eclipse.wst.validation/validate/org/eclipse/wst/validation/internal/ValidatorMetaData.java
+++ b/plugins/org.eclipse.wst.validation/validate/org/eclipse/wst/validation/internal/ValidatorMetaData.java
@@ -337,6 +337,7 @@
 				return true;
 			IContainer[] outputContainers = helper.getOutputContainers(project);
 			IContainer[] sourceContainers = helper.getSourceContainers(project);
+			if(outputContainers != null && sourceContainers != null){
 			for (int i=0; i<outputContainers.length; i++) {
 				String outputPath = outputContainers[i].getProjectRelativePath().makeAbsolute().toString();
                 String filePath = file.getProjectRelativePath().makeAbsolute().toString();
@@ -352,6 +353,7 @@
 				}
 			}
 		}
+		}
 		return true;
 	}