diff --git a/combo/src/main/java/info/nightscout/androidaps/plugins/pump/combo/ComboFragment.java b/combo/src/main/java/info/nightscout/androidaps/plugins/pump/combo/ComboFragment.java
index 8faedd6950..6c760c5297 100644
--- a/combo/src/main/java/info/nightscout/androidaps/plugins/pump/combo/ComboFragment.java
+++ b/combo/src/main/java/info/nightscout/androidaps/plugins/pump/combo/ComboFragment.java
@@ -8,6 +8,7 @@ import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.Button;
+import android.widget.LinearLayout;
 import android.widget.TextView;
 
 import androidx.annotation.NonNull;
@@ -19,6 +20,7 @@ import dagger.android.support.DaggerFragment;
 import info.nightscout.androidaps.combo.R;
 import info.nightscout.androidaps.interfaces.CommandQueue;
 import info.nightscout.androidaps.plugins.bus.RxBus;
+import info.nightscout.androidaps.plugins.pump.combo.data.ComboErrorUtil;
 import info.nightscout.androidaps.plugins.pump.combo.events.EventComboPumpUpdateGUI;
 import info.nightscout.androidaps.plugins.pump.combo.ruffyscripter.PumpState;
 import info.nightscout.androidaps.plugins.pump.combo.ruffyscripter.history.Bolus;
@@ -53,6 +55,12 @@ public class ComboFragment extends DaggerFragment {
     private TextView bolusCount;
     private TextView tbrCount;
 
+    private View errorCountDelimiter;
+    private LinearLayout errorCountLayout;
+    private TextView errorCountLabel;
+    private TextView errorCountDots;
+    private TextView errorCountValue;
+
     @Override
     public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container,
                              Bundle savedInstanceState) {
@@ -69,6 +77,12 @@ public class ComboFragment extends DaggerFragment {
         bolusCount = view.findViewById(R.id.combo_bolus_count);
         tbrCount = view.findViewById(R.id.combo_tbr_count);
 
+        errorCountDelimiter = view.findViewById(R.id.combo_connection_error_delimiter);
+        errorCountLayout = view.findViewById(R.id.combo_connection_error_layout);
+        errorCountLabel = view.findViewById(R.id.combo_connection_error_label);
+        errorCountDots = view.findViewById(R.id.combo_connection_error_dots);
+        errorCountValue = view.findViewById(R.id.combo_connection_error_value);
+
         refreshButton = view.findViewById(R.id.combo_refresh_button);
         refreshButton.setOnClickListener(v -> {
             refreshButton.setEnabled(false);
@@ -240,6 +254,47 @@ public class ComboFragment extends DaggerFragment {
             // stats
             bolusCount.setText(String.valueOf(comboPlugin.getBolusesDelivered()));
             tbrCount.setText(String.valueOf(comboPlugin.getTbrsSet()));
+
+            updateErrorDisplay(false);
+        } else {
+            updateErrorDisplay(true);
         }
     }
-}
\ No newline at end of file
+
+    private void updateErrorDisplay(boolean forceHide) {
+        int errorCount = -1;
+
+        ComboErrorUtil errorUtil = ComboErrorUtil.getInstance();
+
+        if (!forceHide) {
+            ComboErrorUtil.DisplayType displayType = errorUtil.getDisplayType();
+
+            if (displayType== ComboErrorUtil.DisplayType.ON_ERROR || displayType== ComboErrorUtil.DisplayType.ALWAYS) {
+                int errorCountInternal = errorUtil.getErrorCount();
+
+                if (errorCountInternal>0) {
+                    errorCount = errorCountInternal;
+                } else if (displayType== ComboErrorUtil.DisplayType.ALWAYS) {
+                    errorCount = 0;
+                }
+            }
+        }
+
+        if (errorCount >=0) {
+            errorCountDelimiter.setVisibility(View.VISIBLE);
+            errorCountLayout.setVisibility(View.VISIBLE);
+            errorCountLabel.setVisibility(View.VISIBLE);
+            errorCountDots.setVisibility(View.VISIBLE);
+            errorCountValue.setVisibility(View.VISIBLE);
+            errorCountValue.setText(errorCount==0 ?
+                    "-" :
+                    ""+errorCount);
+        } else {
+            errorCountDelimiter.setVisibility(View.GONE);
+            errorCountLayout.setVisibility(View.GONE);
+            errorCountLabel.setVisibility(View.GONE);
+            errorCountDots.setVisibility(View.GONE);
+            errorCountValue.setVisibility(View.GONE);
+        }
+    }
+}
diff --git a/combo/src/main/java/info/nightscout/androidaps/plugins/pump/combo/ComboPlugin.java b/combo/src/main/java/info/nightscout/androidaps/plugins/pump/combo/ComboPlugin.java
index 72f9040087..29d38d54f3 100644
--- a/combo/src/main/java/info/nightscout/androidaps/plugins/pump/combo/ComboPlugin.java
+++ b/combo/src/main/java/info/nightscout/androidaps/plugins/pump/combo/ComboPlugin.java
@@ -38,6 +38,7 @@ import info.nightscout.androidaps.interfaces.Pump;
 import info.nightscout.androidaps.interfaces.PumpDescription;
 import info.nightscout.androidaps.interfaces.PumpPluginBase;
 import info.nightscout.androidaps.interfaces.PumpSync;
+import info.nightscout.androidaps.plugins.pump.combo.data.ComboErrorUtil;
 import info.nightscout.shared.logging.AAPSLogger;
 import info.nightscout.shared.logging.LTag;
 import info.nightscout.androidaps.plugins.bus.RxBus;
@@ -161,6 +162,7 @@ public class ComboPlugin extends PumpPluginBase implements Pump, Constraints {
                         .pluginIcon(R.drawable.ic_combo_128)
                         .pluginName(R.string.combopump)
                         .shortName(R.string.combopump_shortname)
+                        .preferencesId(R.xml.pref_combo)
                         .description(R.string.description_pump_combo),
                 injector, aapsLogger, rh, commandQueue
         );
@@ -172,6 +174,9 @@ public class ComboPlugin extends PumpPluginBase implements Pump, Constraints {
         this.pumpSync = pumpSync;
         this.dateUtil = dateUtil;
 
+        ComboErrorUtil.getInstance().setSP(sp);
+        ComboErrorUtil.getInstance().clearErrors();
+
         pumpDescription.fillFor(PumpType.ACCU_CHEK_COMBO);
     }
 
diff --git a/combo/src/main/java/info/nightscout/androidaps/plugins/pump/combo/data/ComboErrorUtil.java b/combo/src/main/java/info/nightscout/androidaps/plugins/pump/combo/data/ComboErrorUtil.java
new file mode 100755
index 0000000000..79ce7b71dc
--- /dev/null
+++ b/combo/src/main/java/info/nightscout/androidaps/plugins/pump/combo/data/ComboErrorUtil.java
@@ -0,0 +1,106 @@
+package info.nightscout.androidaps.plugins.pump.combo.data;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import info.nightscout.androidaps.combo.R;
+import info.nightscout.shared.sharedPreferences.SP;
+
+/**
+ * Created by andy on 3/17/18.
+ */
+public class ComboErrorUtil {
+
+    private SP sp;
+
+    Map<String, List<ErrorState>> errorMap = new HashMap<>();
+
+    private static final ComboErrorUtil comboDataUtil = new ComboErrorUtil();
+
+    private ComboErrorUtil() {
+    }
+
+    public static ComboErrorUtil getInstance() {
+        return comboDataUtil;
+    }
+
+    public void setSP(SP sp) {
+        this.sp = sp;
+    }
+
+    public void addError(Exception exception) {
+        String exceptionMsg = exception.getMessage();
+
+        if (!errorMap.containsKey(exceptionMsg)) {
+            List<ErrorState> list = new ArrayList<>();
+            list.add(createErrorState(exception));
+
+            errorMap.put(exceptionMsg, list);
+        } else {
+            errorMap.get(exceptionMsg).add(createErrorState(exception));
+        }
+
+        updateErrorCount();
+    }
+
+
+    private void updateErrorCount() {
+        int errorCount = 0;
+
+        if (!isErrorPresent()) {
+            for (List<ErrorState> errorStates : errorMap.values()) {
+                errorCount += errorStates.size();
+            }
+        }
+
+        if (errorCount==0) {
+            if (sp.contains(R.string.key_combo_error_count)) {
+                sp.remove(R.string.key_combo_error_count);
+            }
+        } else {
+            sp.putInt(R.string.key_combo_error_count, errorCount);
+        }
+    }
+
+    private ErrorState createErrorState(Exception exception) {
+        ErrorState errorState = new ErrorState();
+        errorState.setException(exception);
+        errorState.setTimeInMillis(System.currentTimeMillis());
+
+        return errorState;
+    }
+
+    public void clearErrors() {
+        if (errorMap != null)
+            this.errorMap.clear();
+        else
+            this.errorMap = new HashMap<>();
+
+        if (sp.contains(R.string.key_combo_error_count)) {
+            sp.remove(R.string.key_combo_error_count);
+        }
+    }
+
+    public boolean isErrorPresent() {
+        return !this.errorMap.isEmpty();
+    }
+
+    public int getErrorCount() {
+        return sp.contains(R.string.key_combo_error_count) ?
+                sp.getInt(R.string.key_combo_error_count, -1) : -1;
+    }
+
+    public DisplayType getDisplayType() {
+        String displayTypeString = sp.getString(R.string.key_show_comm_error_count, "ON_ERROR");
+        return DisplayType.valueOf(displayTypeString);
+    }
+
+    public enum DisplayType {
+        NEVER,
+        ON_ERROR,
+        ALWAYS
+    }
+
+}
diff --git a/combo/src/main/java/info/nightscout/androidaps/plugins/pump/combo/data/ErrorState.java b/combo/src/main/java/info/nightscout/androidaps/plugins/pump/combo/data/ErrorState.java
new file mode 100755
index 0000000000..ec00441309
--- /dev/null
+++ b/combo/src/main/java/info/nightscout/androidaps/plugins/pump/combo/data/ErrorState.java
@@ -0,0 +1,17 @@
+package info.nightscout.androidaps.plugins.pump.combo.data;
+
+public class ErrorState {
+
+    private Exception exception;
+    private long timeInMillis;
+
+
+    public void setException(Exception exception) {
+        this.exception = exception;
+    }
+
+
+    public void setTimeInMillis(long timeInMillis) {
+        this.timeInMillis = timeInMillis;
+    }
+}
diff --git a/combo/src/main/java/info/nightscout/androidaps/plugins/pump/combo/ruffyscripter/RuffyScripter.java b/combo/src/main/java/info/nightscout/androidaps/plugins/pump/combo/ruffyscripter/RuffyScripter.java
index f5aedff356..155c9f45ae 100644
--- a/combo/src/main/java/info/nightscout/androidaps/plugins/pump/combo/ruffyscripter/RuffyScripter.java
+++ b/combo/src/main/java/info/nightscout/androidaps/plugins/pump/combo/ruffyscripter/RuffyScripter.java
@@ -25,6 +25,7 @@ import java.util.Date;
 import java.util.List;
 import java.util.Objects;
 
+import info.nightscout.androidaps.plugins.pump.combo.data.ComboErrorUtil;
 import info.nightscout.shared.logging.StacktraceLoggerWrapper;
 import info.nightscout.androidaps.plugins.pump.combo.ruffyscripter.commands.ReadQuickInfoCommand;
 import info.nightscout.androidaps.plugins.pump.combo.ruffyscripter.history.PumpHistoryRequest;
@@ -188,6 +189,14 @@ public class RuffyScripter implements RuffyCommands {
         }
     }
 
+    private void addError(Exception e) {
+        try {
+            ComboErrorUtil.getInstance().addError(e);
+        } catch (Exception ex) {
+            log.error("Combo data util problem." + ex.getMessage(), ex);
+        }
+    }
+
     @Override
     public synchronized void disconnect() {
         if (ruffyService == null) {
@@ -196,10 +205,16 @@ public class RuffyScripter implements RuffyCommands {
         try {
             log.debug("Disconnecting");
             ruffyService.doRTDisconnect();
+            try {
+                ComboErrorUtil.getInstance().clearErrors();
+            } catch (Exception ex) {
+                log.error("Combo data util problem." + ex.getMessage(), ex);
+            }
         } catch (RemoteException e) {
             // ignore
         } catch (Exception e) {
             log.warn("Disconnect not happy", e);
+            addError(e);
         }
     }
 
@@ -262,9 +277,11 @@ public class RuffyScripter implements RuffyCommands {
                         log.debug("Executing " + cmd + " took " + (cmdEndTime - cmdStartTime) + "ms");
                     } catch (CommandException e) {
                         log.info("CommandException running command", e);
+                        addError(e);
                         cmd.getResult().success = false;
                     } catch (Exception e) {
                         log.error("Unexpected exception running cmd", e);
+                        addError(e);
                         cmd.getResult().success = false;
                     }
                 }, cmd.getClass().getSimpleName());
@@ -329,10 +346,12 @@ public class RuffyScripter implements RuffyCommands {
             } catch (CommandException e) {
                 log.error("CommandException while executing command", e);
                 PumpState pumpState = recoverFromCommandFailure();
+                addError(e);
                 return activeCmd.getResult().success(false).state(pumpState);
             } catch (Exception e) {
                 log.error("Unexpected exception communication with ruffy", e);
                 PumpState pumpState = recoverFromCommandFailure();
+                addError(e);
                 return activeCmd.getResult().success(false).state(pumpState);
             } finally {
                 Menu menu = this.currentMenu;
diff --git a/combo/src/main/res/layout/combopump_fragment.xml b/combo/src/main/res/layout/combopump_fragment.xml
index 0ea1d9c0cb..5ca2fe8be9 100644
--- a/combo/src/main/res/layout/combopump_fragment.xml
+++ b/combo/src/main/res/layout/combopump_fragment.xml
@@ -472,6 +472,55 @@
 
             </LinearLayout>
 
+            <View
+                android:id="@+id/combo_connection_error_delimiter"
+                android:layout_width="fill_parent"
+                android:layout_height="2dip"
+                android:layout_marginBottom="5dp"
+                android:layout_marginLeft="20dp"
+                android:layout_marginRight="20dp"
+                android:layout_marginTop="5dp"
+                android:background="@color/list_delimiter" />
+
+            <LinearLayout
+                android:id="@+id/combo_connection_error_layout"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:orientation="horizontal">
+
+                <TextView
+                    android:id="@+id/combo_connection_error_label"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_weight="1.5"
+                    android:gravity="end"
+                    android:paddingRight="5dp"
+                    android:text="@string/pump_commerror_label"
+                    android:textSize="14sp" />
+
+                <TextView
+                    android:id="@+id/combo_connection_error_dots"
+                    android:layout_width="5dp"
+                    android:layout_height="wrap_content"
+                    android:layout_weight="0"
+                    android:gravity="center_horizontal"
+                    android:paddingEnd="2dp"
+                    android:paddingStart="2dp"
+                    android:text=":"
+                    android:textSize="14sp" />
+
+                <TextView
+                    android:id="@+id/combo_connection_error_value"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_weight="1"
+                    android:gravity="start"
+                    android:paddingLeft="5dp"
+                    android:textColor="@android:color/white"
+                    android:textSize="14sp" />
+
+            </LinearLayout>
+
             <View
                 android:layout_width="fill_parent"
                 android:layout_height="2dip"
diff --git a/combo/src/main/res/values/arrays.xml b/combo/src/main/res/values/arrays.xml
new file mode 100755
index 0000000000..8c1cf71796
--- /dev/null
+++ b/combo/src/main/res/values/arrays.xml
@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string-array name="comboErrorDisplay">
+        <item>@string/combo_error_display_never</item>
+        <item>@string/combo_error_display_error</item>
+        <item>@string/combo_error_display_always</item>
+    </string-array>
+
+    <string-array name="comboErrorDisplayValues">
+        <item>@string/key_combo_error_display_never</item>
+        <item>@string/key_combo_error_display_error</item>
+        <item>@string/key_combo_error_display_always</item>
+    </string-array>
+</resources>
\ No newline at end of file
diff --git a/combo/src/main/res/values/strings.xml b/combo/src/main/res/values/strings.xml
index dd844055ee..314a3e468c 100644
--- a/combo/src/main/res/values/strings.xml
+++ b/combo/src/main/res/values/strings.xml
@@ -57,4 +57,19 @@
     <string name="combo_pump_serial" translatable="false">combo_pump_serial</string>
     <string name="combo_tbrs_set" translatable="false">combo_tbrs_set</string>
     <string name="combo_boluses_delivered" translatable="false">combo_boluses_delivered</string>
-</resources>
\ No newline at end of file
+    <string name="pump_commerror_label">Comm. Error count</string>
+    <string name="key_combo_error_count" translatable="false">combo_error_count</string>
+    <string name="key_combo_name_settings" translatable="false">combo_name_settings</string>
+    <string name="key_show_comm_error_count" translatable="false">show_error_count</string>
+    <string name="show_comm_error_count_title">Show comm. error count</string>
+    <string name="show_comm_error_count_summary">Shows count of errors, when communicating with Ruffy. In most cases number higher than 0 denotes, Ruffy communication problems (restart might be needed).</string>
+
+    <string name="combo_error_display_never">Never</string>
+    <string name="combo_error_display_error">When Error</string>
+    <string name="combo_error_display_always">Always</string>
+
+    <string name="key_combo_error_display_never" translatable="false">NEVER</string>
+    <string name="key_combo_error_display_error" translatable="false">ON_ERROR</string>
+    <string name="key_combo_error_display_always" translatable="false">ALWAYS</string>
+
+</resources>
diff --git a/combo/src/main/res/xml/pref_combo.xml b/combo/src/main/res/xml/pref_combo.xml
new file mode 100755
index 0000000000..601bc4f62f
--- /dev/null
+++ b/combo/src/main/res/xml/pref_combo.xml
@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.preference.PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:validate="http://schemas.android.com/apk/res-auto">
+
+    <PreferenceCategory
+        android:key="@string/key_combo_name_settings"
+        android:title="@string/combopump"
+        app:initialExpandedChildrenCount="0">
+
+        <ListPreference
+            android:defaultValue="@string/combo_error_display_error"
+            android:entries="@array/comboErrorDisplay"
+            android:entryValues="@array/comboErrorDisplayValues"
+            android:key="@string/key_show_comm_error_count"
+            android:summary="@string/show_comm_error_count_summary"
+            android:selectable="true"
+            android:title="@string/show_comm_error_count_title" />
+
+    </PreferenceCategory>
+
+</androidx.preference.PreferenceScreen>
\ No newline at end of file