The problem is that my JNLP file works locally on my 64-bit machine (running on my own machine), and locally and remotely on my 32-bit machine – but not remotely on the 64-bit machine (you see the Java 6… message for a looong time, and then it just terminates!). Any suggestions about how to trouble-shoot this? Should I specify different libraries for 64-bit and 32-bit? FWIW the jnlp file looks like this (maybe quite wrong!):
<?xml version="1.0" encoding="UTF-8"?>
<jnlp spec="1.0+"
codebase="http://www.jpaulmorrison.com/graphicsstuff/">
<information>
<title>DrawFBP</title>
<vendor>J.P. Morrison Enterprises, Ltd.</vendor>
<description>FBP Diagramming Tool</description>
<icon href="DrawFBP-logo.jpg"/>
</information>
<security>
<all-permissions/>
</security>
<offline-allowed/>
<resources>
<j2se version="1.6+"/>
<j2se version="1.5"/>
<jar href="DrawFBP_signed-2.3.jar" main="true"/>
<extension name="javahelp" href="javahelp.jnlp">
</extension>
</resources>
<application-desc/>
</jnlp>
and javahelp.jnlp is as follows:
<!-- Java Network Launching Protocol file for JavaHelp
(requires Java Web Start http://www.java.com/) - thanks to www.koders.com -->
<jnlp codebase="https://jwindows.dev.java.net/" href="javahelp.jnlp" spec="1.0+">
<information>
<title>Java Help</title>
<vendor>Sun Microsystems</vendor>
<homepage href="http://java.sun.com/products/javahelp/"/>
<description>Java Help 2.0</description>
<offline-allowed/>
</information>
<security>
<all-permissions/>
</security>
<resources>
<j2se version="1.5+"/>
<jar href="lib/jhall.jar" part="javahelp"/>
<package name="javax.help" part="javahelp" recursive="true"/>
</resources>
<component-desc/>
</jnlp>
TIA
Turns out you have to install both the 32-bit version of Java and the 64-bit version. Very confusing, but apparently Java can figure out which to use! It would be nice (but not essential) if someone could tell me why this works…?
PS I posted this to the Oracle forum, and nobody answered it either 🙂 I will post this answer there too.