attribute variation issues

Hello,

when select a variable product to add to cart it is not selected and says invalid value for attribute.
if i am missing something or need to modify please let me know

if ($attributes = $oscdb->get_results(“select pa.price_prefix, pa.options_values_price, po.products_options_name, pov.products_options_values_name FROM products_attributes pa, products_options po, products_options_values pov WHERE pa.products_id='”.$product[‘products_id’].”‘ AND pov.products_options_values_id = pa.options_values_id AND pov.language_id=po.language_id AND po.language_id=1 AND pa.options_id=products_options_id”, ARRAY_A)) {

wp_set_object_terms($product_id, ‘variable’, ‘product_type’);
$attrib_array = array();
$attrib_combo = array();
$max_price = $product[‘products_price’];
$min_price = $product[‘products_price’];
foreach ($attributes as $attribute) {
$slug = sanitize_title($attribute[‘products_options_name’]);
$attrib_array[$slug] = array(
‘name’ => $attribute[‘products_options_name’],
‘value’ => ltrim($attrib_array[$slug][‘value’] . ‘ | ‘ . $attribute[‘products_options_values_name’], ‘ | ‘),
‘position’ => 0,
‘is_visible’ => 1,
‘is_variation’ => 1,
‘is_taxonomy’ => 0);
if($attribute[‘price_prefix’] == ‘-‘)$attributeprefix = ‘-‘;
else if($attribute[‘price_prefix’] == ‘+’)$attributeprefix = ‘+’;
else $attributeprefix = ”;
$attrib_combo[$slug][] = array($attribute[‘products_options_values_name’], $attributeprefix . $attribute[‘options_values_price’]);
}
// Now it gets tricky…
$combos = otw_cartesian_product($attrib_combo);

foreach ($combos as $combo) {

$variation_id = wp_insert_post(array(
‘post_title’ => ‘Product ‘ . $product_id . ‘ Variation’,
‘post_content’ => ”,
‘post_status’ => ‘publish’,
‘post_type’ => ‘product_variation’,
‘post_author’ => 1,
‘post_parent’ => $product_id
));

$opt_price = $product[‘products_price’] .$attributeprefix. $attribute[‘options_values_price’];
$special_price = $special[‘specials_new_products_price’];

foreach ($combo as $k => $v) {

update_post_meta($variation_id, ‘attribute_’ . $k, $v[0]);
$opt_price += $v[1];
$special_price += $v[1];
}

update_post_meta($variation_id, ‘_sku’, ” );
update_post_meta($variation_id, ‘_regular_price’, $opt_price);
update_post_meta($variation_id, ‘_price’, $opt_price);
update_post_meta($variation_id, ‘_thumbnail_id’, 0);
update_post_meta($variation_id, ‘_stock’, $product[‘products_quantity’]);
if ($special) {
update_post_meta($variation_id, ‘_sale_price’, $special_price);
if ($special[‘expires_date’] > time()) {
update_post_meta($variation_id, ‘_sale_price_dates_to’, date(“Y-m-d”, $special[‘expires_date’]));
update_post_meta($variation_id, ‘_sale_price_dates_from’, date(“Y-m-d”));
}
}
if ($opt_price > $max_price) {
$max_price = $opt_price;
}
if ($opt_price < $min_price) {
$min_price = $opt_price;
}
}

update_post_meta($product_id, ‘_product_attributes’, $attrib_array);
update_post_meta($product_id, ‘_max_variation_regular_price’, $max_price);
update_post_meta($product_id, ‘_min_variation_regular_price’, $min_price);
update_post_meta($product_id, ‘_max_variation_price’, $max_price);
update_post_meta($product_id, ‘_min_variation_price’, $min_price);
}