struct interaction_value *iv = iap->reverse_interaction_value_map[y];
for (x = iap->base_subscript_short; x < iap->base_subscript_short + df ;++x)
{
struct interaction_value *iv = iap->reverse_interaction_value_map[y];
for (x = iap->base_subscript_short; x < iap->base_subscript_short + df ;++x)
{