Index: trunk/Ohana/src/opihi/cmd.data/fit2d.c
===================================================================
--- trunk/Ohana/src/opihi/cmd.data/fit2d.c	(revision 31160)
+++ trunk/Ohana/src/opihi/cmd.data/fit2d.c	(revision 37807)
@@ -138,4 +138,6 @@
     y = yvec[0].elements.Flt;
     z = zvec[0].elements.Flt;
+    if (Weight) dz = dzvec[0].elements.Flt;
+
     for (i = 0; i < xvec[0].Nelements; i++, x++, y++, z++) {
       if (mask[i]) continue;