diff --git a/IDS/G_ITER_generator.m b/IDS/G_ITER_generator.m
index 7ddd8ff96448e49990e4357c2a5bd4bbb444601c..31f8be3895d63f1483cdb561414a27761ef08a1c 100644
--- a/IDS/G_ITER_generator.m
+++ b/IDS/G_ITER_generator.m
@@ -56,6 +56,7 @@ G.rw = rw;
 G.zw = zw;
 G.Twa = Twa;
 G.na = numel(R);
+G.Tvs = [];
 
 
 end
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