Index: trunk/Ohana/src/opihi/dvo/calmextract.c
===================================================================
--- trunk/Ohana/src/opihi/dvo/calmextract.c	(revision 14590)
+++ trunk/Ohana/src/opihi/dvo/calmextract.c	(revision 15509)
@@ -93,6 +93,6 @@
 
       /* find data for filter 2 (REF) */
-      M2 = NO_MAG;
-      dM2 = NO_MAG;
+      M2 = NAN;
+      dM2 = NAN;
       for (j = 0; j < catalog.average[i].Nm; j++) {
 	if (catalog.measure[m+j].photcode != code[1][0].code) continue;
@@ -100,5 +100,5 @@
 	dM2 = catalog.measure[m+j].dM;
       }	
-      if (M2 == NO_MAG) continue;
+      if (isnan(M2)) continue;
       
       /* find data for filter 1 */