diff --git a/src/asterx1_process.cpp b/src/asterx1_process.cpp
index 5e04d15651378e857bea1e063126b6039c21c763..fc6144ce77fdaefe5c73820c96e07dfb4c3df8f3 100644
--- a/src/asterx1_process.cpp
+++ b/src/asterx1_process.cpp
@@ -58,9 +58,14 @@ void CAsteRx1Process::generate_gps_nav(gpstk::EngEphemeris &ephemeris,TGPSNav &g
     gps_nav.i_dot=ephemeris.getIDot();
     gps_nav.wnt_oc=gps_epoch.GPSModWeek();
     gps_nav.wnt_oe=gps_epoch.GPSModWeek();
+  }catch(gpstk::InvalidParameter &e){
+    /* ignore the Error for including subframes 4 and 5 */
+    //std::cout << e.what() << std::endl;
+  }catch(gpstk::InvalidRequest &e){
+    /* this should not happen */
+    //std::cout << e.what() << std::endl;
   }catch(...){
     std::cout << "Exception" << std::endl;
-    throw;
   }
 }