diff --git a/octoprint_SlicerEstimator/__init__.py b/octoprint_SlicerEstimator/__init__.py
index ed4c0da..cc8dfb9 100644
--- a/octoprint_SlicerEstimator/__init__.py
+++ b/octoprint_SlicerEstimator/__init__.py
@@ -178,9 +178,9 @@ def on_event(self, event, payload):
                     if slicer_additional["slicer"] == SLICER_SIMPLIFY3D:
                         # Simplify3D has no embedded time left
                         self._estimator.use_progress = True
+                        self._estimator.time_total = slicer_additional["printtime"]
                     else:
                         self._estimator.use_progress = False
-                    self._estimator.time_total = slicer_additional["printtime"]
                 self._slicer_filament_change = self._file_manager._storage_managers["local"].get_additional_metadata(path,"slicer_filament_change")
                 self._send_metadata_print_event(origin, path)
                 self._send_filament_change_event(origin, path)
@@ -189,7 +189,9 @@ def on_event(self, event, payload):
             # Init of Class variables for new estimation
             self._slicer_estimation = None
             self._sliver_estimation_str = None
-            self._estimator.estimated_time = -1
+            self._estimator.time_left = -1.0
+            self._estimator.time_total = -1.0
+            self._estimator.use_progress = False
             self._slicer_filament_change = None
             self._logger.debug("Event received: {}".format(event))
 
@@ -345,11 +347,11 @@ def get_metadata_file(self, plugin_identifier, target, origin, path):
                 return_list = []
                 meta_selected = filter(lambda elem: elem["targets"][plugin_identifier][target] == True, self._metadata_list)
                 additional_metadata = self._file_manager._storage_managers[origin].get_additional_metadata(path, "slicer")
-                for meta_item in meta_selected:
-                    additional_metadata = self._file_manager._storage_managers[origin].get_additional_metadata(path, "slicer")
-                    if meta_item["id"] in additional_metadata:
-                        return_item = [meta_item["id"], meta_item["description"], additional_metadata[meta_item["id"]]]
-                        return_list.append(return_item)
+                if additional_metadata:
+                    for meta_item in meta_selected:
+                        if meta_item["id"] in additional_metadata:
+                            return_item = [meta_item["id"], meta_item["description"], additional_metadata[meta_item["id"]]]
+                            return_list.append(return_item)
                 return return_list
             else:
                 self._logger.error("Target {} of plugin {} not registered.".format(target, plugin_identifier))
diff --git a/octoprint_SlicerEstimator/estimator.py b/octoprint_SlicerEstimator/estimator.py
index c98174c..1edadcc 100644
--- a/octoprint_SlicerEstimator/estimator.py
+++ b/octoprint_SlicerEstimator/estimator.py
@@ -17,17 +17,17 @@ def __init__(self, job_type):
 
     def estimate(self, progress, printTime, cleanedPrintTime, statisticalTotalPrintTime, statisticalTotalPrintTimeType):
         std_estimator = PrintTimeEstimator.estimate(self, progress, printTime, cleanedPrintTime, statisticalTotalPrintTime, statisticalTotalPrintTimeType)
+        logger.debug("SlicerEstimator: Time Left {}, Use Progress {}, Progress {}, Cleaned Print Time {}, Stat. Total Print Time {}, Stat. Total Print Time Type {}".format(self.time_left, self.use_progress, progress, cleanedPrintTime, statisticalTotalPrintTime, statisticalTotalPrintTimeType))
 
         if self._job_type != "local" or ( self.time_left == -1.0 and not self.use_progress ) or cleanedPrintTime is None or progress is None:
-            # using standard estimator
-            self.time_left = std_estimator[0]
+            # using standard estimator            
             return std_estimator
         elif std_estimator[1] == "average" and self.average_prio:
             # average more important than estimation
             self.time_left = std_estimator[0]
             return std_estimator
         elif self.use_progress:
-            # progress based estimation - as GCODe position based not very accurate
+            # progress based estimation - as GCODE position based not very accurate
             self.time_left = self.time_total - (progress * 0.01 * self.time_total)
             logger.debug("SlicerEstimator: Estimation Reported {}".format(self.time_left))
             return self.time_left, "slicerestimator"