Index: trunk/Ohana/src/opihi/cmd.data/histogram.c
===================================================================
--- trunk/Ohana/src/opihi/cmd.data/histogram.c	(revision 15487)
+++ trunk/Ohana/src/opihi/cmd.data/histogram.c	(revision 15514)
@@ -37,4 +37,5 @@
   V = xvec[0].elements;
   for (i = 0; i < xvec[0].Nelements; i++, V++) {
+    if (isnan(*V)) continue;
     bin = MIN (MAX (0, (*V - start) / delta), Nbins - 1);
     yvec[0].elements[bin] += 1.0;