ARCHIVE / What is a 501 error?
When accessing a URL or submitting a form on a web site you may occasionally come across a 501 error. Such error messages indicate that the web server or application software has not been set up or programmed correctly to handle a condition the server software is experiencing. This error code is subsequently up to the web site administrator to resolve. Because of this, rather than trying to access the web page or resubmit a form a few more times, we advise you to send an email to the web site administrator notifying them of the error, preferably with information about how you came about it in order for the administrator to more easily be able to resolve the problem.
last updated 2007.11.12