Index: trunk/BNC/src/combination/bnccomb.cpp
===================================================================
--- trunk/BNC/src/combination/bnccomb.cpp	(revision 9292)
+++ trunk/BNC/src/combination/bnccomb.cpp	(revision 9296)
@@ -327,4 +327,9 @@
     QString    staID(orbCorr._staID.c_str());
     QString    prn(orbCorr._prn.toInternalString().c_str());
+    char       sys = orbCorr._prn.system();
+
+    if (!_cmbSysPrn.contains(sys)){
+      continue;
+    }
 
     // Find/Check the AC Name
@@ -362,4 +367,8 @@
     QString    prn(clkCorr._prn.toInternalString().c_str());
     char       sys = clkCorr._prn.system();
+
+    if (!_cmbSysPrn.contains(sys)){
+      continue;
+    }
 
     // Set the last time
