From ea6fd3f48053bc7aafdfc6ed051d1df5d6369ed7 Mon Sep 17 00:00:00 2001
From: Clemens Brunner <clemens.brunner@gmail.com>
Date: Wed, 11 Dec 2024 22:01:40 +0100
Subject: [PATCH] Update mne/io/base.py

Co-authored-by: Daniel McCloy <dan@mccloy.info>
---
 mne/io/base.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/mne/io/base.py b/mne/io/base.py
index 9c751245166..3d185ae6eab 100644
--- a/mne/io/base.py
+++ b/mne/io/base.py
@@ -1553,7 +1553,9 @@ def rescale(self, scale, *, verbose=None):
         else:
             for ch_type, ch_scale in scale.items():
                 if ch_type not in self.get_channel_types():
-                    raise ValueError(f"Invalid channel type: {ch_type}")
+                    raise ValueError(
+                        f'Channel type "{ch_type}" is not present in the Raw file.'
+                    )
                 else:
                     self.apply_function(
                         lambda x: x * ch_scale, picks=ch_type, channel_wise=False