The Web-browser should open the file strap.jnlp with the program javaws. Some browsers do not know the location of javaws on the hard disk and must be told that files ending with "jnlp" need to be opened with javaws. In this case locate /bin/javaws on the hard-disk (on Windows \bin\javaws.exe).
The following three snapshots explain settings in firefox: Step 1, Step 2, Step 3.

Initially, google chrome just downloads the Jnlp. You need to click the down-arrow of the downloaded jnlp-file. This opens a menu. Click "Open" in the menu.

You may activate the check-box: "Always open files with this type".

You can improve things even more in the option panel of google-chrome:

Go to section "Downloads" in the options panel. Deactivate check-box "For downloading ask for location".


If the problems persist, read STRAP is not starting. If you are within an Intranet, then the problems may be Web-proxy related.



Web-proxy: In institutions, connections to the Internet are often going via a . If this is the case it is likely that Java-Web-start will initially not work. You will need to enter the proxy settings manually. This is very similar to specifying the Web-proxy in Web-browsers. Actually you can manually copy the Web-proxy from your Web-browser.
For example in Firefox browser the Web-proxy settings are in Menu-bar>Edit>Preferences Snapshot. Visit the last Tab "Advanced" and go to "Configure how Firefox connects to the Internet." Snapshot.
Now you need to open the Java-Web-Start control panel. The command to open the control panel for Java-Web-Start depends on the Java version. The following commands are possible: "ControlPanel", "javaws -viewer" or "javacpl.exe". Windows users can go to Windows-Start-menu>Settings>Java.
Find "Network Settings" in the Java-Web-Start Control panel and enter the Web-proxy settings Snapshot.
Specifying the Web proxy: In institutions, it is often necessary to specify the Web-proxy in Java-Webstart manually for the Java-Webstart to work..
proxy