error on (/public_html/googlecheckout/logs/response_error.log) Shopping cart not obtained from session

Problem:(/public_html/googlecheckout/logs/response_error.log)
shopping cart not obtained from session.Solution: Set to False admin->configuration->session->Prevent Spider Sessions configuration
Side effects:You’ll see spiders as active users.
Solution 2 (Recommended): Remove any string like ‘jakarta’ in the includes/spider.txt