# Designer fails to start with custom module

**URL:** <https://forum.inductiveautomation.com/t/designer-fails-to-start-with-custom-module/8669>\
**Category:** Ignition\
**Created:** [July 4, 2014, 7:36pm UTC](https://forum.inductiveautomation.com/t/designer-fails-to-start-with-custom-module/8669 "2014-07-04T19:36:25Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![chuckcoughlin](https://avatars.discourse-cdn.com/v4/letter/c/e19b73/32.png) [@chuckcoughlin](https://forum.inductiveautomation.com/u/chuckcoughlin)\
**Post date:** [July 4, 2014, 7:36pm UTC](https://forum.inductiveautomation.com/t/designer-fails-to-start-with-custom-module/8669/1 "2014-07-04T19:36:25Z")

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Using Ignition 7.7.0 - beta4 SDK. On attempting to start designer with custom module, get:

java.io.IOException: undefined StackMapTable attribute (old archive format)

This happens for several custom modules. Java 8, eclipse Luna 4.4.  
I suspect that the problem is an out-of-date ant Pack200Task.jar (just a guess). I get the same error just using the command-line unpack200 on my module.pack.gz file. I made sure that I was using the AntLib distributed with the current SDK version. If I remove packing from my ant scripts, all works well.

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**Author:** ![chuckcoughlin](https://avatars.discourse-cdn.com/v4/letter/c/e19b73/32.png) [@chuckcoughlin](https://forum.inductiveautomation.com/u/chuckcoughlin)\
**Post date:** [July 5, 2014, 1:52am UTC](https://forum.inductiveautomation.com/t/designer-fails-to-start-with-custom-module/8669/2 "2014-07-05T01:52:28Z")

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Found this post by Carl [https://inductiveautomation.com/forum/search.php?keywords=pack200.properties&terms=all&author=&sc=1&sf=all&sk=t&sd=d&sr=posts&sv=0&st=0&ch=300&t=0&sid=0a4b0ed55ffbbf89f6ccc9ab1102815a&submit=Search](https://inductiveautomation.com/forum/search.php?keywords=pack200.properties&terms=all&author=&sc=1&sf=all&sk=t&sd=d&sr=posts&sv=0&st=0&ch=300&t=0&sid=0a4b0ed55ffbbf89f6ccc9ab1102815a&submit=Search) that pointed out that the last two lines of the pack200.properties file should be removed.

```auto
com.sun.java.util.jar.pack.package.majver=150
com.sun.java.util.jar.pack.package.minver=7
```

With these lines removed, the module loads and Designer starts OK. Note: I should point out that these lines are present in the pack200.properties file supplied with beta4.

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**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:** [July 7, 2014, 2:30pm UTC](https://forum.inductiveautomation.com/t/designer-fails-to-start-with-custom-module/8669/3 "2014-07-07T14:30:56Z")

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Updating and testing the SDK for 7.7 is one of the things that’s in progress but obviously not completed. 🙂 My best guess is a fully updated and tested SDK will be in an early release candidate for 7.7.1.