See also startup.txt and memory.txt and pdbid.txt
----------------
FG 3.0:

When an unavailable PDB code is specified in
http://files.rcsb.org/download/1abc.pdb
RCSB replies with an html file saying "404 Not Found".

jmolLoadStructCallback is assigned to loadStructCallback in fg.htm

IN MSGCALL.JS:
jmolLoadStructCallback() in consurf/msgcall.js calls
	announceNoPDB() [it IS being used] which calls
	showHelp('makeBadPDBFileHelp()')
makeBadPDBFileHelp() (help.js) says the PDB file is not available.

For a file NOT available, jmolLoadStructCallback()
	in Firefox
		msgcall.js #13 jmolLoadStructCallback():
		p1 = jmolApplet0
		p2 = null <-- THIS IS HOW FAILURE IS DETECTED.
		p3 = zapped
		p4 = null
		p5 = null
	in Chrome
	in Safari
		p2 = 0

For an available PDB file, jmolLoadStructCallback():
msgcall.js #13 jmolLoadStructCallback():
p1 = jmolApplet0
p2 = https://files.rcsb.org/download/1D66.pdb
p3 = 1D66.pdb
p4 = 1D66
p5 = null
----------------
Jan 2010 (v 1.44):

Discovered that asynchronous concurrent messageCallbacks were confounding
my jmolMessageCallback() code that attempted to detect HPUB files.

At Bob's advice, removed that code and instead added
jmolLoadStructCallback() (also in consurf/msgcall.js).

Inserted (into help.js) makeBadPDBFileHelp() adapted from FGiJ 1.03.

----------------

FOUND Jan 2010 (v 1.44):

1.03 simply turned blank for an HPUB entry.

Version 1.02/03 were supposed to do something intelligent.

It has makeBadPDBFileHelp() in help.js
and checkLoadCompletion() in moldoc.js.
checkLoadCompletion() was never in service, I think.
It simply looks to see if loading was completed in a specified time,
and that is not a workable solution.

Incidentally, messageCallBack was added in FGiJ 1.02, the version
in which HPUB was supposed to be detected.
Later it was used heavily for header processing for ConSurf/Tel-Aviv.

1.02/03 look for 
ScriptException:unrecognized file format
in jmolMessageCallback. Although the version of Jmol is unchanged,
maybe a change at RCSB causes a different response?

With an HPUB entry in FGiJ 1.03 from SDSC, this appears in the Jmol console:
load http://molvis.sdsc.edu/rcsbproxy/3IYE.pdb.gz
File Error:java.security.AccessControlException: access denied
	(java.net.SocketPermission www.rcsb.org:80 connect,resolve)
ScriptException:java.security.AccessControlException: access denied
	(java.net.SocketPermission www.rcsb.org:80 connect,resolve)


----------------------------

The current version traps "fileNotFoundException" and alerts,
see BadPdb in consurf/msgcall.js.

Neither makeBadPDBFile() nor loadCompletion are present in the
current version. In fact, Agent Ransack quickly showed that only
version 1.02 and 1.03 (991and1.0) ever had badpdb or
loadcompletion code. 

Current Jmol reports
java.io.FileNotFoundException: www.rcsb.org/pdb/nosuchfile.jsp
evidently having redirected from the URL sent, which was
(reported when debugging mode is turned on via advanced options)
http://www.rcsb.org/pdb/cgi/export.cgi/3IYE.pdb.gz