diff --git a/Model/read_table_for_open.py b/Model/read_table_for_open.py
index 1364332..d1cc39e 100644
--- a/Model/read_table_for_open.py
+++ b/Model/read_table_for_open.py
@@ -626,7 +626,7 @@ class ReadTableForOpen:
         stg.M_profile_fine = np_f64_parse(next(it))
         stg.ks = np_f64_parse(next(it))
         stg.sv = np_f64_parse(next(it))
-        stg.X_exponent = np_f64_parse(next(it))
+        stg.X_exponent = np_f64_parse(next(it)).tolist()
         stg.alpha_s = np_f64_parse(next(it))
         stg.zeta = np_f64_parse(next(it))
         stg.FCB = np_f64_parse(next(it))