inv_pick_wave_pick_confirm_pub.pick_confirm ending in error status but no errors are returned

  We are using this API for transact move order. It is failing for few items but no error message is displyed. Do we need any profile option setup etc. for same?

   Below is code we are using for same. x_msg_data  is not returning anything for us.

  inv_pick_wave_pick_confirm_pub.pick_confirm
                            (p_api_version_number      => l_num_api_version_number,
                             p_init_msg_list           => fnd_api.g_true,
                             p_commit                  => fnd_api.g_false,
                             p_move_order_type         => 3,
                             p_transaction_mode        => 1,
                             x_return_status           => l_return_status,
                             x_msg_count               => l_num_msg_count,
                             x_msg_data                => l_chr_msg_data,