Instead of raising an exception I'll print a warning in case the output list is empty.

templates/compress.py

@@ -32,7 +32,7 @@ def compress_outputs():
     output_files = [Path(f) for f in output_files]
 
     if not output_files:
-        raise AssertionError("The list of files is empty!")
+        logger.warning("The list of files is empty!")
 
     # Define output dir and create it in case it doesn't exist
     OUTPUT_DIR = WORKDIR / "output" / STARTDATE / MEMBER