Index: trunk/ippTools/src/chiptool.c
===================================================================
--- trunk/ippTools/src/chiptool.c	(revision 30907)
+++ trunk/ippTools/src/chiptool.c	(revision 31954)
@@ -743,4 +743,5 @@
         faulted = false;
     }
+    PXOPT_LOOKUP_BOOL(pstamp_order, config->args, "-pstamp_order", false);
 
     psMetadata *where = psMetadataAlloc();
@@ -787,4 +788,10 @@
         // don't list faulted rows
         psStringAppend(&query, " %s", "AND chipProcessedImfile.fault = 0");
+    }
+
+    if (pstamp_order) {
+        // put runs in order of exposure id with newest chip Runs first
+        // The postage stamp parser depends on this behavior
+        psStringAppend(&query, "\nORDER by exp_id, chip_id DESC");
     }