Index: trunk/ppSim/src/ppSimMakeBiassec.c
===================================================================
--- trunk/ppSim/src/ppSimMakeBiassec.c	(revision 14463)
+++ trunk/ppSim/src/ppSimMakeBiassec.c	(revision 18011)
@@ -6,4 +6,7 @@
 
     psMetadata *recipe = psMetadataLookupMetadata(NULL, config->recipes, PPSIM_RECIPE); // Recipe
+
+    bool bias = psMetadataLookupBool(&mdok, recipe, "BIAS"); // Generate a Bias?
+    if (!bias) return NULL;
 
     psList *biassec = psMetadataLookupPtr(NULL, cell->concepts, "CELL.BIASSEC"); // Bias regions