Index: trunk/BNC/src/PPP/pppFilter.cpp
===================================================================
--- trunk/BNC/src/PPP/pppFilter.cpp	(revision 6035)
+++ trunk/BNC/src/PPP/pppFilter.cpp	(revision 6036)
@@ -211,5 +211,5 @@
     // Check number of observations, truncate matrices
     // -----------------------------------------------
-    if (iObs+1 < OPT->_minObs) {
+    if (iObs == -1) {
       return failure;
     }