--- a/src/lte/model/pf-ff-mac-scheduler.cc	
+++ a/src/lte/model/pf-ff-mac-scheduler.cc	
@@ -803,6 +803,7 @@ PfFfMacScheduler::DoSchedDlTriggerReq (const struct FfMacSchedSapProvider::Sched
                   // HARQ retx cannot be performed on this TTI -> store it
                   dlInfoListUntxed.push_back (m_dlInfoListBuffered.at (i));
                   NS_LOG_INFO (this << " No resource for this retx -> buffer it");
+                  continue;
                 }
             }
           // retrieve RLC PDU list for retx TBsize and update DCI