From 9fd4e4733ac221dbdf8b80c9567889190bf6c5ba Mon Sep 17 00:00:00 2001
From: Timmerman <ltimmerman3@ipsec-10-2-67-68.vpn.gatech.edu>
Date: Tue, 29 Oct 2024 12:10:39 -0400
Subject: [PATCH] Adding SPIN to list of optional parameters to avoid error

---
 sparc/sparc_parsers/ion.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sparc/sparc_parsers/ion.py b/sparc/sparc_parsers/ion.py
index 280eefb3..cf8708a4 100644
--- a/sparc/sparc_parsers/ion.py
+++ b/sparc/sparc_parsers/ion.py
@@ -129,7 +129,7 @@ def _write_ion(
         ]:
             val = block.get(key, None)
             # print(key, val)
-            if (key not in ["RELAX", "COORD", "COORD_FRAC"]) and (val is None):
+            if (key not in ["RELAX", "COORD", "COORD_FRAC", "SPIN"]) and (val is None):
                 raise ValueError(f"Key {key} is not provided! Abort writing ion file")
             # TODO: change the API version
             if val is None: