From 958e002c69ae50afcc4136d756c4f30ad797a0ac Mon Sep 17 00:00:00 2001
From: atb1995 <alex.brown1995@hotmail.co.uk>
Date: Wed, 1 Nov 2023 11:45:19 +0000
Subject: [PATCH] Error switched to Runtime

---
 gusto/time_discretisation.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gusto/time_discretisation.py b/gusto/time_discretisation.py
index 2cdfb4b55..79c8af94e 100644
--- a/gusto/time_discretisation.py
+++ b/gusto/time_discretisation.py
@@ -95,7 +95,7 @@ def __init__(self, domain, field_name=None, solver_parameters=None,
             elif self.wrapper_name == "supg":
                 self.wrapper = SUPGWrapper(self, options)
             else:
-                raise NotImplementedError(
+                raise RuntimeError(
                     f'Time discretisation: wrapper {self.wrapper_name} not implemented')
         else:
             self.wrapper = None