Index: trunk/ppViz/src/ppVizPattern/ppVizPatternLoop.c
===================================================================
--- trunk/ppViz/src/ppVizPattern/ppVizPatternLoop.c	(revision 27404)
+++ trunk/ppViz/src/ppVizPattern/ppVizPatternLoop.c	(revision 28008)
@@ -80,4 +80,11 @@
                 }
 
+                // Remove bias sections to avoid warnings
+                psMetadataItem *biassec = psMetadataLookup(readout->parent->concepts, "CELL.BIASSEC");
+                if (psListLength(biassec->data.V)) {
+                    psFree(biassec->data.V);
+                    biassec->data.V = psListAlloc(NULL);
+                }
+
                 readout->data_exists = true;
                 readout->parent->data_exists = true;