# Ignition and Windows 8.1 64bit

**URL:** <https://forum.inductiveautomation.com/t/ignition-and-windows-8-1-64bit/7844>\
**Category:** Ignition\
**Created:** [January 15, 2014, 6:55pm UTC](https://forum.inductiveautomation.com/t/ignition-and-windows-8-1-64bit/7844 "2014-01-15T18:55:54Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![claudio](https://avatars.discourse-cdn.com/v4/letter/c/7cd45c/32.png) [@claudio](https://forum.inductiveautomation.com/u/claudio)\
**Post date:** [January 15, 2014, 6:55pm UTC](https://forum.inductiveautomation.com/t/ignition-and-windows-8-1-64bit/7844/1 "2014-01-15T18:55:54Z")

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Hello,  
I’m having troubles launching designer and/or Ignition project from clients using Windows 8.1 Pro 64 bit and Java 7.  
I’m getting the error:

java.lang.SecurityException: Missing required Permissions manifest attribute in main jar: [xxx.xx.xx.xx:8080/main/system/la … client.jar](http://xxx.xx.xx.xx:8080/main/system/launchbin/launchclient.jar)  
at com.sun.deploy.security.DeployManifestChecker.verifyMainJar(Unknown Source)  
at com.sun.deploy.security.DeployManifestChecker.verifyMainJar(Unknown Source)  
at com.sun.javaws.Launcher.doLaunchApp(Unknown Source)  
at com.sun.javaws.Launcher.run(Unknown Source)  
at java.lang.Thread.run(Unknown Source)

Could you help me please?  
Thank you in advance  
Best regards  
Claudio

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**Author:** ![Colby.Clegg](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/colby.clegg/32/3282_2.png) [@Colby.Clegg](https://forum.inductiveautomation.com/u/Colby.Clegg)\
**Post date:** [January 15, 2014, 7:19pm UTC](https://forum.inductiveautomation.com/t/ignition-and-windows-8-1-64bit/7844/2 "2014-01-15T19:19:44Z")

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Hi,

The attribute that the error is referring to has been added for Ignition 7.6.4 and 7.5.11. What version are you currently running?

Regards,

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**Author:** ![claudio](https://avatars.discourse-cdn.com/v4/letter/c/7cd45c/32.png) [@claudio](https://forum.inductiveautomation.com/u/claudio)\
**Post date:** [January 15, 2014, 9:27pm UTC](https://forum.inductiveautomation.com/t/ignition-and-windows-8-1-64bit/7844/3 "2014-01-15T21:27:55Z")

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My Ignition version is 7.6.3

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<div class="post-metadata">

**Author:** ![claudio](https://avatars.discourse-cdn.com/v4/letter/c/7cd45c/32.png) [@claudio](https://forum.inductiveautomation.com/u/claudio)\
**Post date:** [January 16, 2014, 1:18pm UTC](https://forum.inductiveautomation.com/t/ignition-and-windows-8-1-64bit/7844/4 "2014-01-16T13:18:35Z")

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Solved: downgrading Java to ver. 7 uodate 25, it works fine.