Index: branches/BNC_2.13/src/PPP/pppFilter.cpp
===================================================================
--- branches/BNC_2.13/src/PPP/pppFilter.cpp	(revision 9996)
+++ branches/BNC_2.13/src/PPP/pppFilter.cpp	(revision 9998)
@@ -265,5 +265,5 @@
     // ----------------------------
     if (iObs == -1) {
-      LOG << " number of observations == -1\n";
+      LOG << " number of observations == " << iObs + 1 << "\n";
       return failure;
     }