Index: trunk/psModules/src/concepts/pmConceptsStandard.c
===================================================================
--- trunk/psModules/src/concepts/pmConceptsStandard.c	(revision 9677)
+++ trunk/psModules/src/concepts/pmConceptsStandard.c	(revision 10447)
@@ -324,5 +324,5 @@
     // Need TIMESYS first
     psString timesysName = psStringCopy(pattern->name); // e.g., "CELL.TIME" --> "CELL.TIMESYS"
-    timesysName = psStringSubstitute(timesysName, "TIMESYS", "TIME");
+    psStringSubstitute(&timesysName, "TIMESYS", "TIME");
     bool mdok = false;                  // Result of MD lookup
     psTimeType timeSys;                 // The time system