A compilation of items, identified during an automated process, that were unsuccessfully retrieved from a designated source. This record serves as a log of retrieval failures, often containing details such as the item’s identifier, timestamp of the attempted download, and the reason for the failure. For instance, in software distribution, it might enumerate packages that could not be installed due to network issues or corrupted files.
Such a register is crucial for maintaining system integrity and ensuring completeness of data acquisition. Its benefits include facilitating error diagnostics, enabling retry mechanisms, and providing insights into underlying systemic problems. Historically, the management of these records has evolved from manual tracking in text files to sophisticated database-driven solutions capable of automated analysis and reporting.