From 8d8b762e0ecfeecff798c561b90db0df77648024 Mon Sep 17 00:00:00 2001
From: Stephane Rigaud <stephane.rigaud@pasteur.fr>
Date: Thu, 21 Nov 2024 14:08:41 +0100
Subject: [PATCH] set error at backend initialisation not device

---
 pyclesperanto/_core.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/pyclesperanto/_core.py b/pyclesperanto/_core.py
index a1ef34ac..28f8e473 100644
--- a/pyclesperanto/_core.py
+++ b/pyclesperanto/_core.py
@@ -130,6 +130,12 @@ def select_backend(backend: str = "opencl") -> str:
     BackendManager.set_backend(backend=backend)
     # reset current device to default one
     select_device()
+
+    if _current_device._instance is None:
+        raise RuntimeError(
+            "No device available. Please check your system installation."
+        )
+
     return f"{BackendManager.get_backend()} selected."