diff --git a/blender_cloud/flamenco/__init__.py b/blender_cloud/flamenco/__init__.py
index 5c0bf3e..a555318 100644
--- a/blender_cloud/flamenco/__init__.py
+++ b/blender_cloud/flamenco/__init__.py
@@ -397,21 +397,34 @@ class FLAMENCO_OT_copy_files(Operator,
 
     stop_upon_exception = True
 
-    async def async_execute(self, context):
+    async def async_execute(self, context) -> None:
         from pathlib import Path
         from ..blender import preferences
 
-        context.window_manager.flamenco_status = 'PACKING'
         prefs = preferences()
         exclusion_filter = (prefs.flamenco_exclude_filter or '').strip()
 
-        outpath, missing_sources = await bat_interface.copy(
-            context,
-            Path(context.blend_data.filepath),
-            Path(prefs.cloud_project_local_path),
-            Path(prefs.flamenco_job_file_path),
-            exclusion_filter
-        )
+        storage_path = prefs.flamenco_job_file_path  # type: str
+
+        try:
+            outpath, missing_sources = await bat_interface.copy(
+                context,
+                Path(context.blend_data.filepath),
+                Path(prefs.cloud_project_local_path),
+                Path(storage_path),
+                exclusion_filter
+            )
+        except bat_interface.FileTransferError as ex:
+            self.log.error('Could not transfer %d files, starting with %s',
+                           len(ex.files_remaining), ex.files_remaining[0])
+            self.report({'ERROR'}, 'Unable to transfer %d files' % len(ex.files_remaining))
+            self.quit()
+            return
+        except bat_interface.Aborted:
+            self.log.warning('BAT Pack was aborted')
+            self.report({'WARNING'}, 'Aborted Flamenco file packing/transferring')
+            self.quit()
+            return
 
         if missing_sources:
             names = (ms.name for ms in missing_sources)
@@ -711,6 +724,8 @@ class FLAMENCO_PT_render(bpy.types.Panel, FlamencoPollMixin):
             layout.operator(FLAMENCO_OT_render.bl_idname,
                             text='Render on Flamenco',
                             icon='RENDER_ANIMATION')
+            if bpy.app.debug:
+                layout.operator(FLAMENCO_OT_copy_files.bl_idname)
         elif flamenco_status == 'INVESTIGATING':
             row = layout.row(align=True)
             row.label('Investigating your files')
diff --git a/blender_cloud/flamenco/bat_interface.py b/blender_cloud/flamenco/bat_interface.py
index 767ad46..e38d46f 100644
--- a/blender_cloud/flamenco/bat_interface.py
+++ b/blender_cloud/flamenco/bat_interface.py
@@ -6,18 +6,19 @@ import threading
 import typing
 import pathlib
 
-from blender_asset_tracer import pack
-from blender_asset_tracer.pack import progress
-
-from blender_asset_tracer.pack.transfer import FileTransferError
-
 import bpy
+from blender_asset_tracer import pack
+from blender_asset_tracer.pack import progress, transfer
+
 
 log = logging.getLogger(__name__)
 
 _running_packer = None  # type: pack.Packer
 _packer_lock = threading.RLock()
+
+# For using in other parts of the add-on, so only this file imports BAT.
 Aborted = pack.Aborted
+FileTransferError = transfer.FileTransferError
 
 
 class BatProgress(progress.Callback):