fix output names

Author: xadupre

onnx_diagnostic/_command_lines_parser.py

@@ -548,7 +548,9 @@ def _cmd_validate(argv: List[Any]):
             repeat=args.repeat,
             warmup=args.warmup,
             inputs2=args.inputs2,
-            output_names=args.outnames.strip().split(","),
+            output_names=(
+                None if len(args.outnames.strip()) < 2 else args.outnames.strip().split(",")
+            ),
         )
         print("")
         print("-- summary --")

onnx_diagnostic/torch_models/validate.py

@@ -435,6 +435,7 @@ def validate_model(
         )
         print(f"[validate_model] exporter={exporter!r}, optimization={optimization!r}")
         print(f"[validate_model] dump_folder={dump_folder!r}")
+        print(f"[validate_model] output_names={output_names}")
         summary["model_id"] = model_id
         summary["model_subfolder"] = subfolder or ""