diff --git a/waku_scalability/waku_scaling.py b/waku_scalability/waku_scaling.py
index de98853..9750776 100644
--- a/waku_scalability/waku_scaling.py
+++ b/waku_scalability/waku_scaling.py
@@ -408,7 +408,7 @@ def _sanity_check(fname, ftype="json", keys):
                 log.error(f'YAML is not yet supported : {fname}')
                 sys.exit(0)
     except Exception as ex:
-
+        raise typer.BadParameter(str(ex))
 
 
 @app.command()