# Cannot start the designer after an upgrade to Ignition 7.7.6 **URL:** \ **Category:** Ignition\ **Created:** [February 12, 2016, 3:03pm UTC](https://forum.inductiveautomation.com/t/cannot-start-the-designer-after-an-upgrade-to-ignition-7-7-6/11208 "2016-02-12T15:03:43Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![andrea.minu](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/andrea.minu/32/3326_2.png) [@andrea.minu](https://forum.inductiveautomation.com/u/andrea.minu)\ **Post date:** [February 12, 2016, 3:03pm UTC](https://forum.inductiveautomation.com/t/cannot-start-the-designer-after-an-upgrade-to-ignition-7-7-6/11208/1 "2016-02-12T15:03:43Z")
Hi to all I upgraded ignition from 7.6.x to 7.7.6 Now the gateway starts correctly but I cannot start the designer and the clients vision. I have a exception of java when it try to start the designer.jnlp ( see error below). I’m using the last verion of Java ( 1.8.73) Can you help me? [attachment=1]start error.PNG[/attachment] [attachment=0]exception.PNG[/attachment] Thank you very much Andrea ---
**Author:** ![KathyApplebaum](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kathyapplebaum/32/7261_2.png) [@KathyApplebaum](https://forum.inductiveautomation.com/u/KathyApplebaum)\ **Post date:** [February 12, 2016, 3:29pm UTC](https://forum.inductiveautomation.com/t/cannot-start-the-designer-after-an-upgrade-to-ignition-7-7-6/11208/2 "2016-02-12T15:29:19Z")
It doesn’t like the underscore in your gateway’s URL, but that should be a valid character… ![:scratch:](https://us1.discourse-cdn.com/inductiveautomation/original/1X/76d1620bec252bfac07050c889ff5a91dc8a9c25.gif ":scratch:") ---
**Author:** ![andrea.minu](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/andrea.minu/32/3326_2.png) [@andrea.minu](https://forum.inductiveautomation.com/u/andrea.minu)\ **Post date:** [February 18, 2016, 9:54am UTC](https://forum.inductiveautomation.com/t/cannot-start-the-designer-after-an-upgrade-to-ignition-7-7-6/11208/3 "2016-02-18T09:54:00Z")
Hi It’s very strange, because before of the upgrade from 7.6 to 7.7.6 and of Java everything worked correctly. Can you help me? Andrea ---
**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\ **Post date:** [February 18, 2016, 2:30pm UTC](https://forum.inductiveautomation.com/t/cannot-start-the-designer-after-an-upgrade-to-ignition-7-7-6/11208/4 "2016-02-18T14:30:35Z")
[quote=“andrea.minu”]Hi It’s very strange, because before of the upgrade from 7.6 to 7.7.6 and of Java everything worked correctly. Can you help me? Andrea[/quote] I think you will need to change the hostname of the gateway so that it is valid for use inside a URL. I’m not sure what exactly changed between 7.6 and 7.7 that would cause this yet, but the URI/URL syntax parsing is built into Java and an underscore is not legal in a hostname. I’ll ask around and see if we changed something about how the JNLP is generated? ---
**Author:** ![andrea.minu](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/andrea.minu/32/3326_2.png) [@andrea.minu](https://forum.inductiveautomation.com/u/andrea.minu)\ **Post date:** [February 18, 2016, 4:29pm UTC](https://forum.inductiveautomation.com/t/cannot-start-the-designer-after-an-upgrade-to-ignition-7-7-6/11208/5 "2016-02-18T16:29:17Z")
Hi kevin I tried to replicate the problem in a other PC , i called the PC as “VM\_Win7” , with the underscore character. So i called the designer with the following link [VM\_Win7:8088/main/system/launch/ … igner.jnlp](http://VM_Win7:8088/main/system/launch/designer/designer.jnlp) I used the same version of Ignition and the same version of Ignition, and everything works correctly, so I think not related to only to the underscore Andrea ---
**Author:** ![andrea.minu](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/andrea.minu/32/3326_2.png) [@andrea.minu](https://forum.inductiveautomation.com/u/andrea.minu)\ **Post date:** [February 18, 2016, 4:31pm UTC](https://forum.inductiveautomation.com/t/cannot-start-the-designer-after-an-upgrade-to-ignition-7-7-6/11208/6 "2016-02-18T16:31:59Z")
Sorry !! I my previous post there is a little confusion 😕 I have used the same version of Java and igntion. ---
**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\ **Post date:** [February 18, 2016, 4:45pm UTC](https://forum.inductiveautomation.com/t/cannot-start-the-designer-after-an-upgrade-to-ignition-7-7-6/11208/7 "2016-02-18T16:45:56Z")
What are the contents of the JNLP file on the system that works? ---
**Author:** ![andrea.minu](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/andrea.minu/32/3326_2.png) [@andrea.minu](https://forum.inductiveautomation.com/u/andrea.minu)\ **Post date:** [February 19, 2016, 7:52am UTC](https://forum.inductiveautomation.com/t/cannot-start-the-designer-after-an-upgrade-to-ignition-7-7-6/11208/8 "2016-02-19T07:52:50Z")
Hi What do you mean about contents.? Where I check the its contents? Thanl you very much Andrea ---
**Author:** ![MMaynard](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/mmaynard/32/3366_2.png) [@MMaynard](https://forum.inductiveautomation.com/u/MMaynard)\ **Post date:** [February 19, 2016, 1:08pm UTC](https://forum.inductiveautomation.com/t/cannot-start-the-designer-after-an-upgrade-to-ignition-7-7-6/11208/9 "2016-02-19T13:08:25Z")
According to Oracle, Java will not accept an underscore in the host name and is working as designed. Can you launch with the server IP address instead? The underscore \_ character is accepted in a DNS record but not in a URL Host names. ---
**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\ **Post date:** [February 19, 2016, 2:25pm UTC](https://forum.inductiveautomation.com/t/cannot-start-the-designer-after-an-upgrade-to-ignition-7-7-6/11208/10 "2016-02-19T14:25:15Z")
I just mean open the JNLP in a text editor so we can see what’s inside.