Index: trunk/BNC/src/PPP/pppFilter.cpp
===================================================================
--- trunk/BNC/src/PPP/pppFilter.cpp	(revision 9992)
+++ trunk/BNC/src/PPP/pppFilter.cpp	(revision 9997)
@@ -266,4 +266,8 @@
     if (iObs == -1) {
       LOG << " number of observations == " << iObs + 1 << "\n";
+      if (preProcessing) {
+        _obsPool->setRefSatChangeRequired(sys, true);
+        return success;
+      }
       return failure;
     }