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ArcWEB
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Problems
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1995-06-06
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Problems
========
This file is part of ArcWeb, and acts as a troubleshooting guide for those
who have had difficulty installing, configuring and operating ArcWeb. It
assumes that you have read 'Instruct' and all the other ReadMe files.
Question Summary
================
Q1. I try to run !ArcWeb or !ArcWebImg and I get a message saying:
"Find ChangeFSI before loading".
Q2. When I try to load !ArcWeb, it says that it requires the DrawFile
module. What is it and where do I get it?
Q2b. When I try to load !ArcWeb, it says 'nager: Sprites22'. What on
earth does this mean?
Q3. When I use the Open URL dialogue box and specify something like
http://www.demon.co.uk/ in the box, I get an error saying that no fetcher
is available for that URL.
Q4. When I try to use the Open URL dialogue box to open a local file using
local: URLs, I get an error saying that no fetcher is available for that
URL.
Q5. When I try to use the Open URL dialogue box to open a local file using
riscos: URLs, I get an error saying that no fetcher is available for that
URL.
Q6. Sometimes when I load a page, the inlined images are not displayed
Q7. I have heard that UniSys have been threatening to enforce a patent on
the LZ compression used in the GIF file format, as used by many WWW sites.
Does this affect ArcWeb?
Q8. My icon bar is too full with the ArcWebImg and ArcWebLcl icons present
in addition to the main ArcWeb icon. How can I prevent this?
Q9. I don't have the ArcWebLcl or ArcWebImg icons on the icon bar. How do
I get them to appear so I can change the configuration?
Q10. How do I change fonts, colours and default options if I don't like
them?
Q11. How do I set up !ArcWeb for use on a shared network
Q12. I try to run ArcWeb and nothing happens/machine locks up/odd errors
appear (eg. Permission denied).
Q13. What does icon 'x' do?
Q14. When I follow a link to some URLs, I get a dialogue box saying that
authentication is required. What does this mean?
Q15. When I follow a link to some URLs, I get a dialogue box saying that a
non-default port is being used in the URL. What does this mean?
Q16. When I try to run !ArcWeb, I get a stack backtrace/Directory Full
errors
Q17. Why do I get a save dialogue box when trying to read some pages, even
when the object is HTML?
Q18. Sometimes I get 'Too Long' (or similar) error messages whilst the page
is being drawn and then none of the graphics are on the page. Why?
Questions & Answers
===================
Q1. I try to run !ArcWeb or !ArcWebImg and I get a message saying:
"Find ChangeFSI before loading".
A1. ArcWebImg uses ChangeFSI as its image manipulator. It invokes it on the
command line to transform GIFs, JPEGs and other formats into RISC OS sprite
files. If the Filer has not seen ChangeFSI, then ArcWebImg does not know
where it will be able to find this tool. Open a directory viewer containing
!ChangeFSI and then try to run ArcWebImg again. If ArcWebImg was auto run
by ArcWeb, then you will have to quit ArcWeb and load it again, or open the
!WebHelper application (double-click it - no SHIFT required) and run !ArcwebImg
directly.
Q2. When I try to load !ArcWeb, it says that it requires the DrawFile
module. What is it and where do I get it?
A2. The DrawFile module is a relocatable module written by Acorn which
provides SWIs for drawing Draw files (as manipulated by !Draw) on the
screen. ArcWeb uses this module to reduce its own size (since the module
can be shared by many applications it can reduce memory requirements). You
can FTP it from from ftp.acorn.co.uk in /pub/riscos/releases/drawfile.arc
You require at least version 1.30. The higher the version the better though.
Q2b. When I try to load !ArcWeb, it says 'nager: Sprites22'. What on
earth does this mean?
A2b. This appears to happen when an attempt is made to load a newer version
of the DrawFile module over an already loaded version. Kill the old module
with '*rmkill drawfile' and then try again.
Q3. When I use the the Open URL dialogue box and specify something like
http://www.demon.co.uk/ in the box, I get an error saying that no fetcher
is available for that URL.
A3. ArcWeb is not supplied with fetchers for remote documents. These can be
found on the FTP server at Demon Internet in /pub/archimedes/www. You need
to run *one* of these HTTP fetchers alongside KA9Q (!TCPIP) in order to be
able to fetch these documents. ArcWebTCP can be used with Acorn TCP/IP, or
other stack such as Tom Hughes' FreeNet (when it is available). In fact it
can use anything which provides the same BSD socket interface as Acorn TCP/IP.
Q4. When I try to use the Open URL dialogue box to open a local file using
local: URLs, I get an error saying that no fetcher is available for that
URL.
A4. This may indicate that ArcWebLcl isn't running. ArcWebLcl is required
in order to fetch local: URLs. If it is running, then this indicates that
some failure occurred finding the file. This may be because:
i) the filing system you used does not exist
ii) the URL specified a non-existent file
iii) you did not specify the URL correctly. Remember that all / and .
characters after the :: in the filing system name, are transposed.
Remember that these URLs will look odd. Examples of valid URLs:
local://ADFS::HardDisc4/$/WWW/index.html (ADFS::HardDisc4.$.WWW.index/html)
local://SCSI::ScsiDisc7/$/Internet/me.gif (SCSI::ScsiDisc7.$.Internet.me/gif)
local://resources:/$/Apps/!Help (resources:$.Apps.!Help)
Note in particular the strange format for local URLs on filing systems which
do not use device names (eg. resources:)
Q5. When I try to use the Open URL dialogue box to open a local file using
riscos: URLs, I get an error saying that no fetcher is available for that
URL.
A5. riscos: URLs were handled by earlier versions of ArcWebLcl. This URL
naming scheme is now obsolete, superceded by local: URLs, which you must now
use. NOTE: Running on old version of ArcwebLcl alongside the new ArcWebLcl
will not work, as support for the riscos: name system in ArcWeb itself has
been removed. This is because separate routines were needed for resolving
relative references involving riscos: URLs, and these no longer exist.
Q6. Sometimes when I load a page, the inlined images are not displayed
A6. This should have been fixed in version 0.13. Alternatively, look at
the page's menu under the Options submenu to make sure that you haven't
disabled the loading of inlined images.
Q7. I have heard that UniSys have been threatening to enforce a patent on
the LZ compression used in the GIF file format, as used by many WWW sites.
Does this affect ArcWeb?
A7. No. ArcWeb does not contain any code for handling GIF format graphics
files. It merely tests files for filetype &695 (GIF) or for starting GIF87a
or GIF89a, and pulls out the image pixel size (for imagemaps). [GIF is a
registered trademark (and service mark) of CompuServe Inc.]
Q8. My icon bar is too full with the ArcWebImg and ArcWebLcl icons present
in addition to the main ArcWeb icon. How can I prevent this?
A8. Edit the !Run file inside !ArcWebImg (hold down SHIFT whilst double
clicking on the icon in a Filer window). Load the !Run file into !Edit (or
your favourite text editor) and add '-noiconbar' on the last line
of the file. Save it again. Repeat for !ArcWebLcl. Now, neither of these
helpers will ever install an icon bar icon. You can still access the
configuration window by using the Configure menu on the ArcWeb icon bar menu.
Q9. I don't have the ArcWebLcl or ArcWebImg icons on the icon bar. How do
I get them to appear so I can change the configuration?
A9. Double-click on !WebHelper and then double-click on the application you
want. If you have edited the !Run file for each application (inside Helpers
directory) and added -noiconbar to the last line in the file, you must
remove this option. Alternatively, to just change the configuration, use the
Configure submenu on the ArcWeb icon bar menu.
Q10. How do I change fonts, colours and default options if I don't like
them?
A10. There are two levels at which the changes can be made - sy