diff --git a/python/fusion_engine_client/analysis/analyzer.py b/python/fusion_engine_client/analysis/analyzer.py
index ddb7e865..a164374d 100755
--- a/python/fusion_engine_client/analysis/analyzer.py
+++ b/python/fusion_engine_client/analysis/analyzer.py
@@ -155,8 +155,10 @@ def __init__(self,
 
             self.source_ids = source_ids.intersection(self.reader.source_ids)
             # If the requested source IDs are unavailable, raise error.
-            if len(source_ids) == 0:
-                raise ValueError("Requested source ID(s) unavailable. Exiting.")
+            if len(self.source_ids) == 0:
+                self.logger.warning('Requested source IDs unavailable. Cannot extract data.')
+                log_reader = self.reader.get_log_reader()
+                log_reader.filter_in_place(None, clear_existing='source_id')
 
         if time_axis in ('relative', 'rel'):
             self.time_axis = 'relative'
@@ -482,7 +484,11 @@ def plot_pose(self):
             return
 
         # Read the pose data.
-        result = self.reader.read(message_types=[PoseMessage], source_ids=[min(self.source_ids)], **self.params)
+        if len(self.source_ids) > 0:
+            source_id = [min(self.source_ids)]
+        else:
+            source_id = self.source_ids
+        result = self.reader.read(message_types=[PoseMessage], source_ids=source_id, **self.params)
         pose_data = result[PoseMessage.MESSAGE_TYPE]
 
         if len(pose_data.p1_time) == 0:
@@ -697,7 +703,11 @@ def plot_solution_type(self):
             return
 
         # Read the pose data.
-        result = self.reader.read(message_types=[PoseMessage], source_ids=[min(self.source_ids)], **self.params)
+        if len(self.source_ids) > 0:
+            source_id = [min(self.source_ids)]
+        else:
+            source_id = self.source_ids
+        result = self.reader.read(message_types=[PoseMessage], source_ids=source_id, **self.params)
         pose_data = result[PoseMessage.MESSAGE_TYPE]
 
         if len(pose_data.p1_time) == 0:
@@ -883,7 +893,7 @@ def plot_map(self, mapbox_token):
         """!
         @brief Plot a map of the position data.
         """
-        if self.output_dir is None:
+        if self.output_dir is None or len(self.source_ids) == 0:
             return
 
         mapbox_token = self.get_mapbox_token(mapbox_token)
diff --git a/python/fusion_engine_client/parsers/mixed_log_reader.py b/python/fusion_engine_client/parsers/mixed_log_reader.py
index 89b11b48..9d8b45b8 100644
--- a/python/fusion_engine_client/parsers/mixed_log_reader.py
+++ b/python/fusion_engine_client/parsers/mixed_log_reader.py
@@ -452,7 +452,7 @@ def parse_entry_at_index(self, index: file_index.FileIndexEntry):
     def clear_filters(self):
         self.filter_in_place(key=None, clear_existing=True)
 
-    def filter_in_place(self, key, clear_existing: bool = False,
+    def filter_in_place(self, key, clear_existing: Union[bool, str] = False,
                         source_ids: Union[List[int], set[int], tuple[int]] = None):
         """!
         @brief Limit the returned messages by type or time.
@@ -483,15 +483,26 @@ def filter_in_place(self, key, clear_existing: bool = False,
                 # that we just read.
                 prev_offset_bytes = self.index.offset[self.next_index_elem - 1]
 
-        # If requested, clear previous filter criteria.
-        if clear_existing:
-            if self.index is None:
+        if type(clear_existing) == str:
+            # Verify input string and clear accordingly.
+            if clear_existing == 'message_type':
                 self.message_types = copy.deepcopy(self._original_message_types)
+            elif clear_existing == 'time_range':
                 self.time_range = copy.deepcopy(self._original_time_range)
-                self.remove_invalid_p1_time = False
-                self.requested_source_ids = None
+            elif clear_existing == 'source_id':
+                self.requested_source_ids = set()
             else:
-                self.index = self._original_index
+                raise ValueError('Invalid clear_existing flag: %s' % clear_existing)
+        else:
+            # If requested, clear previous filter criteria.
+            if clear_existing:
+                if self.index is None:
+                    self.message_types = copy.deepcopy(self._original_message_types)
+                    self.time_range = copy.deepcopy(self._original_time_range)
+                    self.remove_invalid_p1_time = False
+                    self.requested_source_ids = None
+                else:
+                    self.index = self._original_index
 
         # Set requested source IDs.
         if source_ids is not None:
@@ -504,7 +515,8 @@ def filter_in_place(self, key, clear_existing: bool = False,
                                       'source IDs: {}'.format(unavailable_source_ids))
                 source_ids = list(source_ids.intersection(self.available_source_ids))
                 if len(source_ids) == 0:
-                    raise ValueError("Requested source ID(s) unavailable. Exiting.")
+                    self.logger.debug('Requested source IDs unavailable. Cannot extract data.')
+                    self.filter_in_place(None, clear_existing='source_id')
 
                 if len(unavailable_source_ids) > 0:
                     self.logger.info('Extracting the following available requested source IDs: {}'.format(source_ids))
@@ -604,10 +616,7 @@ def _populate_available_source_ids(self, num_messages_to_read: int = 10):
         self.available_source_ids = set()
         # Loop over all message types and read N of each type.
         for message_type in np.unique(self.index['type']):
-            try:
-                message_type = MessageType(message_type, raise_on_unrecognized=True)
-            except (KeyError, ValueError) as e:
-                continue
+            message_type = MessageType(message_type, raise_on_unrecognized=False)
             self.filter_in_place(message_type)
             num_messages_read = 0
             while num_messages_read < num_messages_to_read: