Index: /trunk/ippTools/src/pstamptool.c
===================================================================
--- /trunk/ippTools/src/pstamptool.c	(revision 38193)
+++ /trunk/ippTools/src/pstamptool.c	(revision 38194)
@@ -1950,4 +1950,8 @@
 
     psString query = pxDataGet("pstamptool_listuser.sql");
+    if (!query) {
+        psError(PXTOOLS_ERR_SYS, false, "failed to retreive SQL statement from pstamptool_listuser.sql");
+        return false;
+    }
 
     psString whereClause = psDBGenerateWhereConditionSQL(where, NULL);