diff --git a/project/npda/general_functions/csv/csv_upload.py b/project/npda/general_functions/csv/csv_upload.py
index c01cc191..56644db1 100644
--- a/project/npda/general_functions/csv/csv_upload.py
+++ b/project/npda/general_functions/csv/csv_upload.py
@@ -293,6 +293,8 @@ async def validate_rows_in_parallel(rows_by_patient, async_client):
                 except Exception as error:
                     errors_to_return[visit_row_index]["__all__"].append(error)
 
-    # Copy csv to a styled xlsx.
-    _ = write_errors_to_xlsx(errors_to_return, new_submission)
+    # Only create xlsx file if the csv file was created.
+    if new_submission.csv_file:
+        _ = write_errors_to_xlsx(errors_to_return, new_submission)
+
     return errors_to_return