Index: trunk/ppSub/src/ppSubReadout.c
===================================================================
--- trunk/ppSub/src/ppSubReadout.c	(revision 20506)
+++ trunk/ppSub/src/ppSubReadout.c	(revision 20516)
@@ -438,4 +438,10 @@
         psStatsOptions renormStdev = psStatsOptionFromString(psMetadataLookupStr(&mdok, recipe,
                                                                                  "RENORM.STDEV"));
+        if (renormMean == PS_STAT_NONE || renormStdev == PS_STAT_NONE) {
+            psError(PS_ERR_BAD_PARAMETER_VALUE, false,
+                    "Unable to parse renormalisation statistics from recipe.");
+            psFree(outRO);
+            return false;
+        }
         int renormNum = psMetadataLookupS32(&mdok, recipe, "RENORM.NUM"); // Number of samples
         float renormWidth = psMetadataLookupS32(&mdok, recipe, "RENORM.WIDTH"); // Width of Gaussian phot