About // Adding variation field data update not work for your 3.2.8 version

// Adding variation field data

function wcfm_product_data_variations_mrp( $variations, $variation_id, $variation_id_key ) {

global $WCFM, $WCFMu;
if( $variation_id ) {
$variations[$variation_id_key][‘mrp_cost_price’] = get_post_meta( $variation_id, ‘mrp_cost_price’, true );
}

return $variations;
}

add_filter( ‘wcfm_variation_edit_data’, ‘wcfm_product_data_variations_mrp’, 100, 3 );

// Saving variation field data
function wcfm_product_variation_save_mrp( $wcfm_variation_data, $new_product_id, $variation_id, $variations, $wcfm_products_manage_form_data ) {
global $WCFM, $WCFMu;
if( $variation_id ) {
update_post_meta( $variation_id, ‘mrp_cost_price’, $variations[ ‘mrp_cost_price’ ] );

}

return $wcfm_variation_data;
}

add_filter( ‘wcfm_product_variation_data_factory’, ‘wcfm_product_variation_save_mrp’, 100, 5 );

when i submit, “mrp_cost_price” field not save now
Could you give me correct work code?