diff --git a/canframemodel.cpp b/canframemodel.cpp
index c7f5ce1..616978b 100644
--- a/canframemodel.cpp
+++ b/canframemodel.cpp
@@ -673,13 +673,31 @@ void CANFrameModel::addFrame(const CANFrame& frame, bool autoRefresh = false)
 
     if (!overwriteDups)
     {
-        frames.append(tempFrame);
-        if (filters[tempFrame.frameId()] && busFilters[tempFrame.bus])
+        bool alloc_ok = true;
+
+        for(int i=0; i<3; i++)
         {
-            if (autoRefresh) beginInsertRows(QModelIndex(), filteredFrames.count(), filteredFrames.count());
-            tempFrame.frameCount = 1;
-            filteredFrames.append(tempFrame);
-            if (autoRefresh) endInsertRows();
+            try
+            {
+                frames.append(tempFrame);
+                break;
+            }
+            catch (const std::exception& ex)
+            {
+                alloc_ok = false;
+                qDebug() << "addFrame failed to append.  frames.length(): " << frames.length() << " Exception: " << ex.what();
+            }
+        }
+
+        if(alloc_ok)
+        {
+            if (filters[tempFrame.frameId()] && busFilters[tempFrame.bus])
+            {
+                if (autoRefresh) beginInsertRows(QModelIndex(), filteredFrames.count(), filteredFrames.count());
+                tempFrame.frameCount = 1;
+                filteredFrames.append(tempFrame);
+                if (autoRefresh) endInsertRows();
+            }
         }
     }
     else //yes, overwrite dups
@@ -728,6 +746,20 @@ void CANFrameModel::addFrame(const CANFrame& frame, bool autoRefresh = false)
 
 void CANFrameModel::addFrames(const CANConnection*, const QVector<CANFrame>& pFrames)
 {
+    if(frames.length() > frames.capacity() * 0.99)
+    {
+        qDebug() << "Frames count: " << frames.length() << " of " << frames.capacity() << " capacity, removing first " << frames.capacity() * 0.05 << " frames";
+        frames.remove(0, frames.capacity() * 0.05);
+        qDebug() << "Frames removed, new count: " << frames.length();
+    }
+
+    if(filteredFrames.length() > filteredFrames.capacity() * 0.99)
+    {
+        qDebug() << "filteredFrames count: " << filteredFrames.length() << " of " << filteredFrames.capacity() << " capacity, removing first " << filteredFrames.capacity() * 0.05 << " frames";
+        filteredFrames.remove(0, filteredFrames.capacity() * 0.05);
+        qDebug() << "filteredFrames removed, new count: " << filteredFrames.length();
+    }
+
     foreach(const CANFrame& frame, pFrames)
     {
         addFrame(frame);