Index: /trunk/psLib/src/types/psArguments.c
===================================================================
--- /trunk/psLib/src/types/psArguments.c	(revision 16113)
+++ /trunk/psLib/src/types/psArguments.c	(revision 16114)
@@ -7,6 +7,6 @@
  *  @author David Robbins, MHPCC
  *
- *  @version $Revision: 1.32 $ $Name: not supported by cvs2svn $
- *  @date $Date: 2008-01-17 21:24:46 $
+ *  @version $Revision: 1.33 $ $Name: not supported by cvs2svn $
+ *  @date $Date: 2008-01-17 21:33:48 $
  *
  *  Copyright 2004-2005 Maui High Performance Computing Center, University of Hawaii
@@ -329,8 +329,11 @@
     case PS_DATA_TIME:
     {
-        psString str = psTimeToISO(arg->data.V);
-        int len = strlen(str);
-        psFree(str);
-        return len;
+        if (arg->data.V) {
+            psString str = psTimeToISO(arg->data.V);
+            int len = strlen(str);
+            psFree(str);
+            return len;
+        }
+        return 0;
     }
     default: