diff --git a/src/distributed_job_manager.py b/src/distributed_job_manager.py
index 1120fd9..203e90a 100644
--- a/src/distributed_job_manager.py
+++ b/src/distributed_job_manager.py
@@ -88,32 +88,71 @@ class DistributedJobManager:
 
         Parameters:
         local_job (BaseRenderWorker): The local parent job worker.
-        subjob_data (dict): subjob data sent from remote server.
+        subjob_data (dict): Subjob data sent from the remote server.
 
         Returns:
         None
         """
 
-        subjob_status = string_to_status(subjob_data['status'])
         subjob_id = subjob_data['id']
         subjob_hostname = next((hostname.split('@')[1] for hostname in local_job.children if
                                 hostname.split('@')[0] == subjob_id), None)
-        local_job.children[f'{subjob_id}@{subjob_hostname}'] = subjob_data
+        subjob_key = f'{subjob_id}@{subjob_hostname}'
 
-        logname = f"{local_job.id}:{subjob_id}@{subjob_hostname}"
+        # Update the local job's subjob data
+        local_job.children[subjob_key] = subjob_data
+
+        logname = f"{local_job.id}:{subjob_key}"
+        subjob_status = string_to_status(subjob_data['status'])
         logger.debug(f"Subjob status changed: {logname} -> {subjob_status.value}")
 
-        # Download complete or partial render jobs
-        if subjob_status in [RenderStatus.COMPLETED, RenderStatus.CANCELLED, RenderStatus.ERROR] and \
-                subjob_data['file_count']:
-            download_result = cls.download_from_subjob(local_job, subjob_id, subjob_hostname)
-            if not download_result:
-                # todo: handle error
+        # Handle downloading for completed, cancelled, or error'd subjobs
+        if (subjob_status in [RenderStatus.COMPLETED, RenderStatus.CANCELLED, RenderStatus.ERROR]
+                and subjob_data['file_count']):
+            if not cls.download_from_subjob(local_job, subjob_id, subjob_hostname):
                 logger.error(f"Unable to download subjob files from {logname} with status {subjob_status.value}")
 
+        # Handle cancelled or errored subjobs by determining missing frames and scheduling a new job
         if subjob_status == RenderStatus.CANCELLED or subjob_status == RenderStatus.ERROR:
-            # todo: determine missing frames and schedule new job
-            pass
+            cls.handle_cancelled_or_errored_subjob(local_job, subjob_data)
+
+    @classmethod
+    def handle_cancelled_or_errored_subjob(cls, local_job, subjob_data):
+        """
+        Handles cancelled or errored subjobs by determining missing frames and scheduling a new job.
+
+        Parameters:
+        local_job (BaseRenderWorker): The local parent job worker.
+        subjob_data (dict): Subjob data for the cancelled or errored subjob.
+
+        Returns:
+        None
+        """
+        # Determine missing frames based on subjob_data
+        missing_frames = cls.determine_missing_frames(subjob_data)
+
+        if missing_frames:
+            # Schedule a new job with the missing frames
+            new_job_data = {
+                # todo: Set the necessary data for the new job
+            }
+            cls.__create_subjob()
+
+    @staticmethod
+    def determine_missing_frames(subjob_data):
+        """
+        Determine missing frames in the subjob.
+
+        Parameters:
+        subjob_data (dict): Subjob data.
+
+        Returns:
+        list: List of missing frame numbers.
+        """
+        # todo: Implement the logic to determine missing frames based on subjob_data
+        missing_frames = []
+        return missing_frames
+
 
     @staticmethod
     def download_from_subjob(local_job, subjob_id, subjob_hostname):
@@ -247,6 +286,7 @@ class DistributedJobManager:
 
             # check that job posts were all successful.
             if not all(d.get('submission_results') is not None for d in subjob_servers):
+                # todo: rewrite this code - should not have to have all submissions go through
                 raise ValueError("Failed to create all subjobs")  # look into recalculating job #s and use exising jobs
 
             # start subjobs