# Retrieving Backtraces

**URL:** <https://forum.sierrawireless.com/t/retrieving-backtraces/4793>\
**Category:** Development tools\
**Created:** [December 23, 2010, 3:05pm UTC](https://forum.sierrawireless.com/t/retrieving-backtraces/4793 "2010-12-23T15:05:01Z")\
**Posts on this page:** 4\
**Page:** 2

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**Author:** ![awneil](https://avatars.discourse-cdn.com/v4/letter/a/49beb7/32.png) [@awneil](https://forum.sierrawireless.com/u/awneil)\
**Post date:** [January 19, 2011, 2:55pm UTC](https://forum.sierrawireless.com/t/retrieving-backtraces/4793/21 "2011-01-19T14:55:42Z")

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It’s beginning to look to me like there’s a bug in the backtrace retrieval such that it only works once…

ie, once you’ve read a backtrace, DS will do this hanging thing if you try to read it again.

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**Author:** ![daav](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/daav/32/2767_2.png) [@daav](https://forum.sierrawireless.com/u/daav)\
**Post date:** [January 20, 2011, 8:06am UTC](https://forum.sierrawireless.com/t/retrieving-backtraces/4793/22 "2011-01-20T08:06:22Z")

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> [@awneil](#):
>
> Is it possible to disable the automatic retrieval of backtraces at startup?  
> If not, I think it should be!

No, and it should be indeed: logged for fix in the next one.

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**Author:** ![gregorbader](https://avatars.discourse-cdn.com/v4/letter/g/51bf81/32.png) [@gregorbader](https://forum.sierrawireless.com/u/gregorbader)\
**Post date:** [March 3, 2011, 1:45pm UTC](https://forum.sierrawireless.com/t/retrieving-backtraces/4793/23 "2011-03-03T13:45:25Z")

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I’m also having troubles with retrieving backtraces, but from an SL6087 with FW R7.44.0.201008311212.

my Environment:

```auto
"DWL","V08b0k","","Sierra Wireless",54744,"061810 16:42","efb16c51","00010000"
"FW","FW_SRC_744_12.SL6087G","R7.44.0.201008311212.SL6087","Sierra Wireless",2146096,"083110 12:12","456cf17c","00020000"
"OAT","1.0.0","xxx","xxx",192248,"030311 09:21","959d77a0","00260000"
 -"Developer Studio","1.2.0.201012171243-R6026"
 -"Open AT Embedded Software Suite package","2.34.0.201009090506"
 -"Open AT OS Package","6.34.0.201007281407"
 -"Firmware Package","7.44.0.201008311212"
 -"WIP Plug-in Package","5.40.0.201007290812"
```

Error Log:

```auto
!ENTRY org.eclipse.core.jobs 4 2 2011-03-03 14:38:48.373
!MESSAGE An internal error occurred during: "Retrieve backtraces".
!STACK 0
java.lang.NullPointerException
	at com.swi.tm.hlservices.backtraces.internal.bundle.BacktraceComponent.getBacktraces(BacktraceComponent.java:51)
	at com.swi.tm.model.targetmanagement.impl.TargetImpl.getBacktraces(TargetImpl.java:1027)
	at com.swi.tm.ui.backtraces.BacktracesPage$2.run(BacktracesPage.java:153)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)
```

So, what to do?

best regards,  
Gregor Bader

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**Author:** ![daav](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/daav/32/2767_2.png) [@daav](https://forum.sierrawireless.com/u/daav)\
**Post date:** [March 8, 2011, 11:05am UTC](https://forum.sierrawireless.com/t/retrieving-backtraces/4793/24 "2011-03-08T11:05:02Z")

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Next DS release will fix a couple of backtrace decoding bugs, including this one.

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