This document discusses e-resource troubleshooting at Columbia University Libraries. It begins by explaining that problems are viewed as opportunities rather than burdens. The nature of common e-resource problems are then described, such as titles dropping from databases or patrons lacking access permissions. Several specific examples of problems are provided, such as missing content or weak catalog records. For each problem, the collaborative solution developed by the libraries is summarized. The document concludes by emphasizing best practices like responding promptly and using problems as teaching opportunities to improve patron experiences and push for changes with vendors.