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)