diff --git a/CEP/Calibration/BBSControl/src/KernelProcessControl.cc b/CEP/Calibration/BBSControl/src/KernelProcessControl.cc
index cce1c19ac72f2a405c28b44ec1f695f4af586e36..cba711ba32bc6d972c2efacbd90a25c2ec211f42 100644
--- a/CEP/Calibration/BBSControl/src/KernelProcessControl.cc
+++ b/CEP/Calibration/BBSControl/src/KernelProcessControl.cc
@@ -136,6 +136,7 @@ namespace LOFAR
         }
         catch(Exception &e) {
           LOG_ERROR_STR("Failed to open observation part: " << path);
+          return false;
         }
 
         try {