Index: /trunk/BNC/src/PPP/pppClient.cpp
===================================================================
--- /trunk/BNC/src/PPP/pppClient.cpp	(revision 8448)
+++ /trunk/BNC/src/PPP/pppClient.cpp	(revision 8449)
@@ -254,5 +254,5 @@
         double res = rr.norm_Frobenius() - satObs->obsValue(tLC)
           - (satObs->xc()[3] - xyzc[3]) * t_CST::c;
-        if (fabs(res) > maxRes || isnan(res)) {
+        if (fabs(res) > maxRes || std::isnan(res)) {
           maxRes      = fabs(res);
           maxResIndex = ii;