| Error message |
What it means |
What you can
do |
| 400 - Bad request |
You entered a URL
that is not accepted as correct. Possibly the server being contacted
doesn't recognize the document you are asking for or it may
no longer exist. It is also possible that it is correct but
you aren't authorized to access it. |
Check the URL to
see if it's correctly spelled and that every letter is in the
right (upper- or lower-) case. Check colons, numbers of slashes,
and tildes. |
| 401 - Unauthorized |
The site being accessed
is protected and you either entered the incorrect password or
the host does not want users coming from your domain to enter.
Some sites will only allow specific domains to access the site.
For example, some (with the .gov top-level domain name) will
only permit users coming from .gov or .edu (educational sites)
to gain access. Or some educational sites only allow access
from other educational sites. |
If you are sure you
have access to the site, try typing the password again. If you
don't have a password or your domain does not have access to
the site, you won't be able to access it. |
| 403 - Forbidden |
You are not permitted
to access this document. It is either password-protected or
the host does not want your domain to enter. |
See above. |
| 404 - Not found |
The host server can't
find the HTML document at the URL you've entered. Either you
have mistyped the URL, the document no longer exists, or you've
been given the wrong URL. |
If your URL ends
in ".htm", try ".html" (and vice versa). To find out whether
the site hosting the document is still active, delete everything
after the last slash in the URL. If this doesn't work, try deleting
the slash and adding .htm or .html to the end. If the site is
still running, try and find the page from another location on
the site that you can reach. |
| 550 - xxxxxxxxx
is not a known user |
Using e-mail, you
sent a note to an e-mail address that isn't recognized at the
mail server you've specified. The e-mail note got all the way
to the mail server (so that part's right), but you may have
entered the user part of the e-mail address incorrectly or the
user may no longer have an account on that server. |
Make sure you entered
the correct e-mail user name. If you suspect it's an old address
or was mistyped in a note sent to you, try looking up a new
address using the person's name. Try e-mail address finding
tools. |
| Bad file request |
The form you're trying
to access is not supported by your browser or there is an error
in the form. |
Try using a different
browser. If the problem persists or another browser is not available,
send an e-mail note to the site's Webmaster. |
| Cannot add form submission result
to bookmark list |
This error message
occurs when you've submitted a search request and then try to
save the result as a bookmark. Even though it may look like
a valid address, the resulting page does not have a URL that
can be reused so it can't be added to your bookmark list. |
Use the Save As
command to save the page to your hard drive. Then you can open
the saved HTML page in your browser and add that to your bookmark
list. |
| Connection refused by host |
You're not permitted
to access this document either because it's password-protected
or the host doesn't permit your domain to enter. |
If you have access
to the site and you know the password, try again, making sure
you type it correctly and with the correct case. |
| Failed DNS lookup |
The URL you requested
could not be translated into a valid Internet address by the
domain name system. This is either a result of a mistake in
the system or you could have mistakenly entered an incorrect
URL. |
Mistakes in DNS lookups
are a common occurrence. Simply clicking the Reload button may
correct the error. If the error persists, you may have entered
an incorrect host name. Try typing the URL again. |
| File contains no data |
The site you accessed
doesn't contain any Web pages on it. It's possible that you're
trying to access the site while the page is being uploaded.
|
Try waiting a minute
and clicking on the Reload button. Make sure that the URL is
typed in correctly. If the problem persists, try again later.
|
| Helper application not found |
You're trying to
load a file of a type that your browser doesn't recognize. Most
browsers can be enabled to view or load file types that they
don't otherwise recognize. These files can be sound files, movie
clips, graphics, ZIP archive files, or any other type of file
you are trying to download. |
The dialog box that
carries this message will tell you the file type that is missing.
You can then follow your browser's instructions for assigning
a viewer for each file format you wish to view online. It's
often better to have certain file formats not assigned to helper
applications for Internet browsers. When files are not assigned
to helper applications, the dialog box you receive has a "Save
to Disk" option. This can often be useful when you want to download
files, such as ZIP archive files, to save them instead of extracting
them right away. |
| Host unavailable |
The server computer
that hosts this site could not be reached. The server may be
offline or down for maintenance. |
Try clicking on the
Reload button. If it still doesn't work, try again later. |
| Host unknown |
The server you're
trying to reach is not connected, or you have lost your own
connection. You may have also entered the URL incorrectly. |
Click the Reload
button and try again. Occasionally, packets don't arrive on
the Internet and a second try will work. Next, make sure you
are connected to the Internet. If you have lost your connection,
simply reconnect and try the URL again. If you still receive
the error, check the URL for typos and case-sensitivity. |
| Network connection was refused
by the server |
Some servers have
limits on the number of people or request they can handle at
a time. If you get this message, the server is probably too
busy to handle one more user. When the server doesn't create
its own message to handle this error, this generic message is
displayed instead. |
Try clicking the
Reload button until you connect. Or try again later. |
| NNTP server error |
This error occurs
when you are trying to log on to a Usenet newsgroup. An NNTP
server is part of your Internet service provider's software,
so if this error occurs the software may be malfunctioning or
the newsgroup does not exist.
| Make sure that the
URL is typed correctly. If you still receive the error, wait
a while and try again. If the problem still persists, contact
your access provider and make them aware of the problem. |
| Permission denied |
This error occurs
when you are connected with an FTP site and you are either uploading
or downloading. Sometimes the site administrator doesn't want
you to upload to the site, download a certain file, or access
a certain directory. The site may also be too busy. |
Check that you are
using the correct procedure to upload or download the file.
Then keep trying until you succeed. If you still receive the
error and know that you're able to upload or download to that
site, contact the Webmaster by phone or e-mail. |
| Too many connections--try again
later |
The limit to the
number of people who can use the site at one time has been exceeded.
You'll have to wait your turn. |
Keep clicking the
Reload button until you connect or try again later when there
is likely to be less traffic. |
| Too many users |
To avoid slow uploading
and downloading rates, site administrators set a maximum number
of users that can access the site at one time. Your request
is one too many. |
Keep trying until
you connect or try again later when there is less Internet traffic.
Check to see whether the site has mirrors, and try one of those.
|
| Unable to locate host |
The server is either
down for maintenance or you may have lost your connection. |
Click the Reload
button; sometimes there is an intermittent problem on the Internet.
Then make sure you're connected to the Internet. If you have
lost your connection, simply reconnect and try the URL again.
If you still receive the error, check the URL for typos and
case- sensitivity. |
| Unable to locate the server |
The server indicated
in the URL you typed or clicked from either no longer exists
or was entered incorrectly. |
Check the URL to
see if everything is correct. Make sure that everything is correctly
spelled and in the correct case (some servers are case-sensitive).
You can also check with the source of the URL to verify that
it is correct. |
| Viewer not found |
Your browser doesn't
recognize files of this type. Most browsers can be extended
to be able to view or load file types that are not otherwise
recognized by browsers, such as movie or sound files. |
When this dialog
box appears, search for a helper application that will open
files of this format. Then follow your browser's instructions
for assigning this viewer to open files of that format online.
|
| You can't log on as an anonymous
user |
This is another FTP
error message. Most browsers submit "anonymous" as your user
ID and your email address as your password. The FTP site you
are connecting to may not allow "anonymous" access. This error
will also occur when the FTP server is currently at its limit
of "anonymous" users. Another possibility is that your browser
doesn't support anonymous FTP access |
Keep trying to access
the FTP site until you succeed. Sometimes the FTP server is
too busy. However, if you don't have a browser that allows anonymous
FTP access or the site is password-protected, enter your user
ID and password manually using FTP software such as WS_FTP or
CuteFTP. |
