Index: /trunk/BNC/src/PPP_free/pppFilter.cpp
===================================================================
--- /trunk/BNC/src/PPP_free/pppFilter.cpp	(revision 6165)
+++ /trunk/BNC/src/PPP_free/pppFilter.cpp	(revision 6166)
@@ -993,5 +993,5 @@
       // Compute Filter Update
       // ---------------------
-      ColumnVector dx;
+      ColumnVector dx(nPar); dx = 0.0;
       kalman(AA, ll, PP, _QQ, dx);
       ColumnVector vv = ll - AA * dx;