If you encounter issues with a feed try running the command again with an additional --refresh option. This will force Zero Install to download a fresh copy of the feed from the web rather than using a locally cached copy.

If you want to receive a more detailed console output, detailing exactly what Zero Install is doing, you can add --verbose to your command-line. Using --verbose --verbose provides even more details, however most of the additional information is only relevant for debugging.

If you encountered an error and did not use --verbose, used the GUI or forgot to copy the console output you can still find the relevant information in log files stored in the %temp% directory. Look for files named like Zero Install * Log.txt. The specific name depends on the EXE you used to access Zero Install.