From b62d0c484151378e6b086ed8b904ac1ab3526dac Mon Sep 17 00:00:00 2001
From: Jan-Lukas Wynen <jan-lukas.wynen@ess.eu>
Date: Mon, 16 Feb 2026 13:06:46 +0100
Subject: [PATCH] Use a list as arg to drop_coords

---
 src/ess/dream/instrument_view.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/ess/dream/instrument_view.py b/src/ess/dream/instrument_view.py
index 9300c197..1ed171d2 100644
--- a/src/ess/dream/instrument_view.py
+++ b/src/ess/dream/instrument_view.py
@@ -13,7 +13,7 @@ def _to_data_array(
         data = sc.DataGroup({"": data})
     pieces = []
     for da in data.values():
-        da = da.drop_coords(set(da.coords) - {"position", dim})
+        da = da.drop_coords(list(set(da.coords) - {"position", dim}))
         dims = list(da.dims)
         if (dim is not None) and (dim in dims):
             # Ensure that the dims to be flattened are contiguous