diff --git a/app/src/main/java/info/nightscout/androidaps/plugins/IobCobCalculator/AutosensData.java b/app/src/main/java/info/nightscout/androidaps/plugins/IobCobCalculator/AutosensData.java
index dddea570be..7a79b62c3a 100644
--- a/app/src/main/java/info/nightscout/androidaps/plugins/IobCobCalculator/AutosensData.java
+++ b/app/src/main/java/info/nightscout/androidaps/plugins/IobCobCalculator/AutosensData.java
@@ -64,7 +64,8 @@ public class AutosensData {
     public double slopeFromMaxDeviation = 0;
     public double slopeFromMinDeviation = 999;
 
-    public String log(long time) {
+    @Override
+    public String toString() {
         return "AutosensData: " + new Date(time).toLocaleString() + " " + pastSensitivity + " Delta=" + delta + " avgDelta=" + avgDelta + " Bgi=" + bgi + " Deviation=" + deviation + " avgDeviation=" + avgDeviation + " Absorbed=" + absorbed + " CarbsFromBolus=" + carbsFromBolus + " COB=" + cob + " autosensRatio=" + autosensRatio + " slopeFromMaxDeviation=" + slopeFromMaxDeviation + " slopeFromMinDeviation =" + slopeFromMinDeviation ;
     }
 
diff --git a/app/src/main/java/info/nightscout/androidaps/plugins/IobCobCalculator/IobCobThread.java b/app/src/main/java/info/nightscout/androidaps/plugins/IobCobCalculator/IobCobThread.java
index 1a4c499c59..5da63ad2f7 100644
--- a/app/src/main/java/info/nightscout/androidaps/plugins/IobCobCalculator/IobCobThread.java
+++ b/app/src/main/java/info/nightscout/androidaps/plugins/IobCobCalculator/IobCobThread.java
@@ -4,6 +4,9 @@ import android.content.Context;
 import android.os.PowerManager;
 import android.support.v4.util.LongSparseArray;
 
+import com.crashlytics.android.Crashlytics;
+import com.crashlytics.android.answers.CustomEvent;
+
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -11,6 +14,7 @@ import java.util.ArrayList;
 import java.util.Date;
 import java.util.List;
 
+import info.nightscout.androidaps.BuildConfig;
 import info.nightscout.androidaps.Config;
 import info.nightscout.androidaps.Constants;
 import info.nightscout.androidaps.MainApp;
@@ -22,6 +26,7 @@ import info.nightscout.androidaps.events.Event;
 import info.nightscout.androidaps.plugins.IobCobCalculator.events.EventAutosensCalculationFinished;
 import info.nightscout.androidaps.queue.QueueThread;
 import info.nightscout.utils.DateUtil;
+import info.nightscout.utils.FabricPrivacy;
 
 /**
  * Created by mike on 23.01.2018.
@@ -151,21 +156,34 @@ public class IobCobThread extends Thread {
                         AutosensData hourAgoData = iobCobCalculatorPlugin.getAutosensData(hourago);
                         if (hourAgoData != null) {
                             int initialIndex = autosensDataTable.indexOfKey(hourAgoData.time);
+                            log.debug(">>>>> bucketed_data.size()=" + bucketed_data.size() + " i=" + i + "hourAgoData=" + hourAgoData.toString());
+                            int past = 1;
+                            try {
+                                for (; past < 12; past++) {
+                                    AutosensData ad = autosensDataTable.valueAt(initialIndex + past);
+                                    double deviationSlope = (ad.avgDeviation - avgDeviation) / (ad.time - bgTime) * 1000 * 60 * 5;
+                                    if (ad.avgDeviation > maxDeviation) {
+                                        slopeFromMaxDeviation = Math.min(0, deviationSlope);
+                                        maxDeviation = ad.avgDeviation;
+                                    }
+                                    if (ad.avgDeviation < minDeviation) {
+                                        slopeFromMinDeviation = Math.max(0, deviationSlope);
+                                        minDeviation = ad.avgDeviation;
+                                    }
 
-                            for (int past = 1; past < 12; past++) {
-                                AutosensData ad = autosensDataTable.valueAt(initialIndex + past);
-                                double deviationSlope = (ad.avgDeviation - avgDeviation) / (ad.time - bgTime) * 1000 * 60 * 5;
-                                if (ad.avgDeviation > maxDeviation) {
-                                    slopeFromMaxDeviation = Math.min(0, deviationSlope);
-                                    maxDeviation = ad.avgDeviation;
+                                    //if (Config.logAutosensData)
+                                    //    log.debug("Deviations: " + new Date(bgTime) + new Date(ad.time) + " avgDeviation=" + avgDeviation + " deviationSlope=" + deviationSlope + " slopeFromMaxDeviation=" + slopeFromMaxDeviation + " slopeFromMinDeviation=" + slopeFromMinDeviation);
                                 }
-                                if (ad.avgDeviation < minDeviation) {
-                                    slopeFromMinDeviation = Math.max(0, deviationSlope);
-                                    minDeviation = ad.avgDeviation;
-                                }
-
-                                //if (Config.logAutosensData)
-                                //    log.debug("Deviations: " + new Date(bgTime) + new Date(ad.time) + " avgDeviation=" + avgDeviation + " deviationSlope=" + deviationSlope + " slopeFromMaxDeviation=" + slopeFromMaxDeviation + " slopeFromMinDeviation=" + slopeFromMinDeviation);
+                            } catch (Exception e) {
+                                log.error("Unhandled exception", e);
+                                FabricPrivacy.logException(e);
+                                FabricPrivacy.getInstance().logCustom(new CustomEvent("CatchedError")
+                                        .putCustomAttribute("buildversion", BuildConfig.BUILDVERSION)
+                                        .putCustomAttribute("version", BuildConfig.VERSION)
+                                        .putCustomAttribute("autosensDataTable", iobCobCalculatorPlugin.getAutosensDataTable().toString())
+                                        .putCustomAttribute("for_data", ">>>>> bucketed_data.size()=" + bucketed_data.size() + " i=" + i + "hourAgoData=" + hourAgoData.toString())
+                                        .putCustomAttribute("past", past)
+                                );
                             }
                         }
                     }
@@ -228,7 +246,7 @@ public class IobCobThread extends Thread {
                     log.debug("Running detectSensitivity from: " + DateUtil.dateAndTimeString(oldestTimeWithData) + " to: " + DateUtil.dateAndTimeString(bgTime));
                     autosensData.autosensRatio = iobCobCalculatorPlugin.detectSensitivity(oldestTimeWithData, bgTime).ratio;
                     if (Config.logAutosensData)
-                        log.debug(autosensData.log(bgTime));
+                        log.debug(autosensData.toString());
                 }
             }
             MainApp.bus().post(new EventAutosensCalculationFinished(cause));