When either the IBM® JRE
or the Oracle JRE is installed on Windows,
the Java™ installer automatically
registers the associated Java plug-in
with both Internet Explorer and Firefox. Plug-in registration conflicts
sometimes occur on Windows when
both JREs are installed.
Before you begin
The symptoms usually involve one of the following messages
being displayed when you launch the
Tivoli Enterprise Portal client:
“Java Plug-in detected JRE collision”
or
“Applet(s) in this HTML page requires a version of java different from the one
the browser is currently using. In order to run the applet(s) in this HTML page,
a new browser session is required.
Press ‘Yes” to start a new browser session.
The solution
is to de-register the plug-in.
About this task
To de-register the Java plug-in
take the following steps:
Procedure
- Launch the IBM Control
Panel for Java or the Oracle Java Control Panel from the Windows Control Panel folder.
- Select the Advanced tab.
- Expand the branch entitled APPLET tag
support.
There should be two entries, one for
"Internet Explorer" and one for "Mozilla and Netscape". Normally,
after installation of Java,
both of these boxes will be checked, meaning that the associated Java plug-ins for those browsers
have been registered.
Figure 1 shows the IBM Control Panel for Java; the Oracle version is almost identical.
Note: The branch labels found in the
Advanced tab
may be different depending on whether you are using Java 1.5, 1.6, or 1.7.
Figure 1 is specific
to Java 1.7. The branch label
for Java 1.7 is entitled
Default Java for browsers. In addition,
the actual labels associated with the browsers listed may differ between
1.5, 1.6, and 1.7. With Java 1.7,
the labels are
Microsoft Internet Explorer and
Mozilla
family.
Figure 1. Java Control Panel window
If you encounter problems loading Tivoli Enterprise Portal
using Firefox, this is one of the first panels you should look at
to ensure that the Java plug-in
has indeed been registered. Often, a quick way to resolve any registration
problems is to simply remove the check mark (if already on), press Apply,
then check the box again, and again press Apply.
This action will switch the option off and on so that the plug-in
registration is reset and the correct Windows registry
entries get re-established.
- Remove the check mark from the box for the browser or browsers
you want to unregister.