diff --git a/xml.multiview/src/org/netbeans/modules/xml/multiview/XmlMultiViewDataObject.java b/xml.multiview/src/org/netbeans/modules/xml/multiview/XmlMultiViewDataObject.java
--- a/xml.multiview/src/org/netbeans/modules/xml/multiview/XmlMultiViewDataObject.java
+++ b/xml.multiview/src/org/netbeans/modules/xml/multiview/XmlMultiViewDataObject.java
@@ -383,6 +383,12 @@
         public void loadData() {
             FileObject file = getPrimaryFile();
             if (fileTime == file.lastModified().getTime()) {
+                // on base of issue #132922
+                // when the file is deleted or IO error happened, lastModified time
+                // is zero and the buffer can stay uninitialized
+                if (!file.isValid()) {
+                    buffer = ""; //NOI18N
+                }
                 return;
             }
             try {