# Designer Launcher Problem

**URL:** <https://forum.inductiveautomation.com/t/designer-launcher-problem/5620>\
**Category:** General Discussion\
**Created:** [December 27, 2012, 2:00pm UTC](https://forum.inductiveautomation.com/t/designer-launcher-problem/5620 "2012-12-27T14:00:13Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![tecnoeletronic](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/tecnoeletronic/32/50975_2.png) [@tecnoeletronic](https://forum.inductiveautomation.com/u/tecnoeletronic)\
**Post date:** [December 27, 2012, 2:00pm UTC](https://forum.inductiveautomation.com/t/designer-launcher-problem/5620/1 "2012-12-27T14:00:13Z")

</div>

Hi,

I’m trying using Ignition Demo on a MAC. (I tried it on Windows 7 and it worked well).  
I follow the installation guide and i’m able to Run/Stop/Restart Ignition.  
I’m able to configure settings (Database and OPC connection) and connections are good.  
When i try to launch designer, firefox download a file “designer.jnlp” and i run it using “Java Web Start”. Application starts loading but never ends! (attached picture).

My info:

OS: Mac OS X Version 10.7.5  
Java: 1.7  
Browser: Firefox/Safari

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<div class="post-metadata">

**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:** [December 27, 2012, 3:52pm UTC](https://forum.inductiveautomation.com/t/designer-launcher-problem/5620/2 "2012-12-27T15:52:52Z")

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Oracle introduced a regression/bug in Webstart with Java 7u9 which hasn’t been fixed yet. The only quick work-around for now is to edit the JNLP file and remove java-vm-args="-XX:MaxPermSize=128m" from any lines that contain it.

For example:

```auto
    <j2se version="1.6+" initial-heap-size="32M" max-heap-size="512M" java-vm-args="-XX:MaxPermSize=128m"/>
    <j2se version="1.5+" initial-heap-size="32M" max-heap-size="512M" java-vm-args="-XX:MaxPermSize=128m"/>
```

Would become:

```auto
    <j2se version="1.6+" initial-heap-size="32M" max-heap-size="512M" />
    <j2se version="1.5+" initial-heap-size="32M" max-heap-size="512M" />
```

You will then be able to launch by double-clicking the JNLP file for the time being.