From 0c55f5fb0c09cfffe3f9956ce9d31e5999ce8529 Mon Sep 17 00:00:00 2001
From: Fabian <fab.hof@gmx.de>
Date: Tue, 11 Nov 2025 10:12:49 +0100
Subject: [PATCH] fix: filter nulls in polars df to align with subsequent check

---
 linopy/common.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/linopy/common.py b/linopy/common.py
index 9d530cc2..90e4f3fe 100644
--- a/linopy/common.py
+++ b/linopy/common.py
@@ -415,6 +415,7 @@ def filter_nulls_polars(df: pl.DataFrame) -> pl.DataFrame:
         cond.append(reduce(operator.or_, [pl.col(c).ne(-1) for c in varcols]))
     if "coeffs" in df.columns:
         cond.append(pl.col("coeffs").ne(0))
+        cond.append(pl.col("coeffs").is_not_null())
     if "labels" in df.columns:
         cond.append(pl.col("labels").ne(-1))