TANGO Interactive [v. 2.0.7.0]
File name: F:\Program Files\Netscape\Communicator\Program\plugins\nptango.dll Collaboratory system for the Web created by WebWisdom.com
Mime Type
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Description
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Suffixes
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Enabled
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application/x-collaboratory
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TANGO Interactive
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tng
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Yes
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If you do not see this entry, you haven't installed TANGO Interactive plugin according to the instruction. Begin from restarting the browser. On some UNIX poltforms Netscape browser needs to be restarted twice to accept new plugin. If problem persists, please, check enviromental variables (UNIX only) or repeat the installation process.
If your plug-in is correctly installed and you still experience problems, please, start Java console (use Netscape's "Communicator" menu). Then, start TANGO Interactive again. The messages appearing in the console should look similar to the following:
When the line: LocalBase: TANGO Interactive Plugin, 2.0.x.x appears in the Java console, you should have TI login window on your screen:
Type in your user ID and password and select the TI server from the menu. If TANGO Interactive client cannot connect to the selected server, it will pop-up an error message window and quit.This can be caused by the following problems:
- the selected server is not running
- you have network connectivity or performance problem
- you are behind firewall.
If you are behind a firewall, you must have a proxy server installed somewhere on your network to be able to access Internet. TI 2 client provides support for firewalls, using SOCKS4 protocol. You must configure your browser to use proxy servers:
In the example above, the browser is configured to use proxy server running on the machine beast.npac.syr.edu. The setup uses default ports for proxy server (8080) and for the SOCKS server (1080). TI client is able to obtain proxy server settings from the browser prefs.js file. If you are behind the firewall, you MUST setup proxies for both HTTP and SOCKS protocol: the HTTP proxy is used to download TI client modules and data, and the SOCKS server enables communication with the TI server. The proxy servers for different protocols can run on different machines.
From experience, we know that firewall problem may be a difficult one. The setup described above is sometimes insufficient. Majority of the TI applets, including the Session Manager, communicate with the HTTP server from which they have been downloaded. We have seen firewalls incompatible with Java security model. Such firewalls will prevent TI (and, for that matter, any other applet) from getting information they need to operate. If you have such a firewall, you will see Java security exceptions with a message stating that applets loaded from the server, say, www.abc.edu, violates security by trying to connect to the server www.abc.edu. This is a bug or misconfiguration of the firewall software, which will prevent you from running ANY Java applets that read data from the server. Contact the firewall vendor or your system administrator. (Note that many proxy servers, such as Netscape Proxy Server, handle such situations without any problem)
An occasional source of problems is Netscape's use of wrong classes cached in memory or on disk. If you get Java exceptions of any kind, flush browser's cache. Set cache size to 0 for both memory and disk caches if you experience problems. Once you are comfortable with the system, restore the cache size to useful values.
Yet another rare set of problems is related to the CLASSPATH variable. This problem usually affects Java developers' machines. Netscape always grabs Java classes from local disk before it gets them from the net. TANGO Interactive SM uses Swing widget libraries. Please, be aware that shall you have a different version of Swing classes in any directory specified in your CLASSPATH, Netscape is going to find and load them and TI client may crash.
If after reading this page you still have problems, please, and send us a message. |