Java Problem

Pcarp · December 3, 2023

Having problems starting the admin console I get the following error. Not to sure where to start looking. I have changeD my browser and reloaded start.jnlp a couple of times. The problem is on a iMac I have another iMac and a windows machine they work fine.

com.sun.deploy.net.FailedDownloadException: Unable to load resource: https://isy.universal-devices.com/launcher/start.jnlp
   at com.sun.deploy.net.DownloadEngine.actionDownload(Unknown Source)
   at com.sun.deploy.net.DownloadEngine.downloadResource(Unknown Source)
   at com.sun.deploy.cache.ResourceProviderImpl.getResource(Unknown Source)
   at com.sun.deploy.cache.ResourceProviderImpl.getResource(Unknown Source)
   at com.sun.javaws.Launcher.updateFinalLaunchDesc(Unknown Source)
   at com.sun.javaws.Launcher.prepareToLaunch(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.access$000(Unknown Source)
   at com.sun.javaws.Main$1.run(Unknown Source)
   at java.lang.Thread.run(Thread.java:750)

#### Java Web Start Error:
#### Unable to load resource: https://isy.universal-devices.com/launcher/start.jnlp

Thanks

PauL

apostolakisl · December 3, 2023

Try downloading the offline java uninstaller. Then run the offline java installer. Then download the start.jnlp file from this forum. Java (at least in the format supporting ISY) is just crappy. I regularly have to mess with it. Back in the day, using ctrl/alt/delete to end some non responsive program was a regular thing, but those days are long gong . . . except for Java. And not on just one computer, but all of my computers. And not just once a year or something, but like once every couple weeks. And I have had to do the offline uninstall/install now about 3 times as well.

Geddy · December 5, 2023

On 12/2/2023 at 8:17 PM, Pcarp said:

The problem is on a iMac

MacOS doesn't play well with *.jnlp files like the IoX Launcher. You need to allow non-app store developers to approved list. I think it's easier than that these days, but not a mac user so can't give specific directions.

If working on another mac and a PC is it possible to use those regularly or is this on a primary machine you use that you want the admin console ability?

What macOS are you running?

As @apostolakisl I would remove Java and download again. Just get the generic Java available from java.com (currently Version 8 Update 391 - https://www.java.com/en/download/manual.jsp).

Then try. It might give you a warning that it's not able to run a file from a source other than the app store. I think you can click more info and still run it. I had limited access to a very old install of macOS that took a few extra clicks (and reading the alerts) to get things to run, but it ran without much trouble. And then ran without effort each time I attempted to launch admin console while I had access to that computer.

You can search the forums for other posts about this for tips/tricks to try. I know @Bumbershoot had several help posts related to this issue that helped me when I tried the process.

Bumbershoot · December 5, 2023

On 12/2/2023 at 5:17 PM, Pcarp said:

The problem is on a iMac I have another iMac and a windows machine they work fine.

I'm not sure this is the problem you're having, but you have to specifically allow software from unknown developers to run on your iMac. Once you try to run 'start.jnlp' and it fails, navigate to the "Systems Settings" app, then click on "Security & Privacy", then scroll down a bit to where you see a dialog that will allow you to install software from an unknown developer. The screenshots illustrate this.