From 4aec32bb28c7ba18fe538f0a3db847d8f3ce4b76 Mon Sep 17 00:00:00 2001
From: Sven Augustin <sven.augustin@psi.ch>
Date: Wed, 9 Jun 2021 16:34:28 +0200
Subject: [PATCH] slightly better error message

---
 kabuki/logic.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/kabuki/logic.py b/kabuki/logic.py
index 722a5ef..08918b7 100644
--- a/kabuki/logic.py
+++ b/kabuki/logic.py
@@ -17,8 +17,9 @@ def get_src(pvname, cls):
 def decide_src_plt_cfg(pvname):
     Src = decide_src_type(pvname)
     src = get_src(pvname, Src)
+
     if not src.is_connected:
-        raise RuntimeError(f"{pvname} is not connected")
+        raise RuntimeError(f"{pvname} is not connected, cannot create plot")
 
     Plt, Cfg = decide_plt_cfg_type(src)
     plt = Plt(name=pvname)