On some system configurations, an error may be logged during startup when Jaxer tries to determine the location of the home folder. This may be caused by an invalid or erroneous setting for the HOME environment variable. Make sure that the HOME environment variable references a location that is both a valid folder and is accessible to the user running jaxer. This error can be ignored however further attempts to use the Jaxer.System.homeFolder property will result in the same exception appearing in the logs and the Jaxer.System.homeFolder value will be null.