Index: /trunk/psModules/src/concepts/pmConceptsRead.c
===================================================================
--- /trunk/psModules/src/concepts/pmConceptsRead.c	(revision 12762)
+++ /trunk/psModules/src/concepts/pmConceptsRead.c	(revision 12763)
@@ -343,8 +343,9 @@
                             value = psMetadataLookup(hduHigh->header, key);
                         }
-                        if (!value) {
+                        if (value) {
+                            psListAdd(values, PS_LIST_TAIL, value);
+                        } else {
                             psWarning("Unable to find header %s --- assuming value is NULL", key);
                         }
-                        psListAdd(values, PS_LIST_TAIL, value);
                     }
                     psFree(keysIter);