Index: /trunk/BNC/src/PPP/pppSatObs.cpp
===================================================================
--- /trunk/BNC/src/PPP/pppSatObs.cpp	(revision 6023)
+++ /trunk/BNC/src/PPP/pppSatObs.cpp	(revision 6024)
@@ -100,4 +100,14 @@
         }
       }
+    }
+  }
+
+  // Check whether all required frequencies available
+  // ------------------------------------------------
+  for (unsigned ii = 0; ii < OPT->LCs(_prn.system()).size(); ii++) {
+    t_lc::type tLC = OPT->LCs(_prn.system())[ii];
+    if (!isValid(tLC)) {
+      _valid = false;
+      return;
     }
   }