Index: /trunk/psModules/src/concepts/pmConceptsStandard.c
===================================================================
--- /trunk/psModules/src/concepts/pmConceptsStandard.c	(revision 12764)
+++ /trunk/psModules/src/concepts/pmConceptsStandard.c	(revision 12765)
@@ -547,4 +547,9 @@
             // Assume the date is first and the time second
             psList *dateTime = concept->data.V; // The list containing items for date and time
+            if (psListLength(dateTime) != 2) {
+                psError(PS_ERR_BAD_PARAMETER_SIZE, false,
+                        "Unable to parse %s: date and time are not both available.", pattern->name);
+                return NULL;
+            }
             psMetadataItem *dateItem = psListGet(dateTime, PS_LIST_HEAD); // Item containing the date
             if (!dateItem) {