Failed to start JWS App "Keep temporary files on my computer " unchecked

Question

We run into a strange problem today.
We have a JWS based app which uses version jars. If we keep the Keep temporary files on my computer " checked in the Java settings the application works fine.
However if we uncheck it then we get an error saying it can not find the jar:
{code}
java.io.FileNotFoundException: https://192.168.40.242/webstart/jrcc-1.6.jar
     at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown
Source)
     at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream
(Unknown Source)
     at com.sun.deploy.net.DownloadEngine.getJarFileWithoutCache(Unknown
Source)
     at com.sun.deploy.net.DownloadEngine.getResource(Unknown Source)
     at com.sun.javaws.LaunchDownload.downloadJarFiles(Unknown Source)
     at com.sun.javaws.LaunchDownload.downloadEagerorAll(Unknown Source)
     at com.sun.javaws.Launcher.downloadResources(Unknown Source)
     at com.sun.javaws.Launcher.prepareLaunchFile(Unknown Source)
     at com.sun.javaws.Launcher.prepareToLaunch(Unknown Source)
     at com.sun.javaws.Launcher.launch(Unknown Source)
     at com.sun.javaws.Main.launchApp(Unknown Source)
     at com.sun.javaws.Main.continueInSecureThread(Unknown Source)
     at com.sun.javaws.Main$1.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)
{code}
Our JNLP looks like this:
{code}
<?xml version="1.0" encoding="UTF-8"?>
<jnlp spec="6.0" codebase="https://192.168.40.242/webstart" >
<information>
<title>JRCC</title>
<vendor>AAA</vendor>
<homepage href="http://www.n-able.com"/>
<description>Desc</description>
<description kind="short">JRCC</description>
<icon kind="splash" href="/images/jrccSplash.gif"/>
</information>
<security>
<all-permissions/>
</security>
<resources>
<j2se href="http://java.sun.com/products/autodl/j2se" version="1.6.0+" initial-heap-size="64m"/>
<jar href="jrcc-1.6.jar" version="6.7.0.285"/>
<jar href="jsch-0.1.39.jar" version="6.7.0.285"/>
</resources>
<application-desc main-class="com.nable.ui.jrcc.Main">
<argument>localport:5900</argument>
<argument>userid:50</argument>
<argument>vnc_targetport:5900</argument>
<argument>vnc_httpport:5800</argument>
<argument>targetport2:10539</argument>
<argument>language:en_US</argument>
<argument>logLevel:5</argument>
<argument>deviceId:1242208079</argument>
</application-desc>
</jnlp>
{code}
Any ideas or suggestions would help.
Should it work with "Keep Temp files on my computer" unchecked ?
Thanks

Answer 1

Guess you use proxy server.
However firstly try Solution 1. If it does not work try 2.
Solution 1
1. Open Java control panel, goto "Advanced" tab
2. In tree branch "Java plug-in" uncheck "Enable the next generation Java plug-in"
3. Restart the browser if you launch your applet in browser.
Solution 2
1. Open Java control panel, goto "Advanced" tab
2. In tree branch "Security" check "Use SSL 2.0 compatible ClientHello format"
3. Restart the browser if you launch your applet in browser.