# Team Foundation Unmap Working Folder error - Property not found : serverName

**URL:** https://www.finalbuilder.com/forums/t/team-foundation-unmap-working-folder-error-property-not-found-servername/2199
**Category:** Discussion
**Created:** [September 17, 2013, 2:42am UTC](https://www.finalbuilder.com/forums/t/team-foundation-unmap-working-folder-error-property-not-found-servername/2199 "2013-09-17T02:42:55Z")
**Posts on this page:** 5
**Page:** 1

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### Author: ![ingrid.rooney](https://www.finalbuilder.com/forums/letter_avatar_proxy/v4/letter/i/6bbea6/32.png) [@ingrid.rooney](https://www.finalbuilder.com/forums/u/ingrid.rooney)
#### Post date: [September 17, 2013, 2:42am UTC](https://www.finalbuilder.com/forums/t/team-foundation-unmap-working-folder-error-property-not-found-servername/2199/1 "2013-09-17T02:42:55Z")

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Hi,

We&nbsp;are using&nbsp;TFS 2012 for our source control and were able to successfully execute unmap working folder actions till yesterday. However, since yesterday night all our unmap actions are failing with this error:

Path to Executable: C:\Program Files (x86)\Microsoft Visual Studio 11.0\Common7\IDE\tf.exe  
An error occured generating the command line:  
Property not found : serverName

We have a release due tomorrow and any help would be much appreciated.

Thanks.

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### Author: ![nevar](https://www.finalbuilder.com/forums/letter_avatar_proxy/v4/letter/n/c4cdca/32.png) [@nevar](https://www.finalbuilder.com/forums/u/nevar)
#### Post date: [September 18, 2013, 1:34am UTC](https://www.finalbuilder.com/forums/t/team-foundation-unmap-working-folder-error-property-not-found-servername/2199/2 "2013-09-18T01:34:09Z")

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Hi Ingrid,   
  
 I reproduced the error and am working on a fix now for you.

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### Author: ![nevar](https://www.finalbuilder.com/forums/letter_avatar_proxy/v4/letter/n/c4cdca/32.png) [@nevar](https://www.finalbuilder.com/forums/u/nevar)
#### Post date: [September 18, 2013, 3:33am UTC](https://www.finalbuilder.com/forums/t/team-foundation-unmap-working-folder-error-property-not-found-servername/2199/3 "2013-09-18T03:33:09Z")

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Hi Ingrid,   
  
 A build with the fix to this issue is located here:   
  
 [http://downloads.finalbuilder.com/downloads/finalbuilder/700/FB700\_2506.exe](http://downloads.finalbuilder.com/downloads/finalbuilder/700/FB700_2506.exe)

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<div class="post-metadata">

### Author: ![ingrid.rooney](https://www.finalbuilder.com/forums/letter_avatar_proxy/v4/letter/i/6bbea6/32.png) [@ingrid.rooney](https://www.finalbuilder.com/forums/u/ingrid.rooney)
#### Post date: [September 18, 2013, 5:12am UTC](https://www.finalbuilder.com/forums/t/team-foundation-unmap-working-folder-error-property-not-found-servername/2199/4 "2013-09-18T05:12:32Z")

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What was wrong with the existing install?

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<div class="post-metadata">

### Author: ![nevar](https://www.finalbuilder.com/forums/letter_avatar_proxy/v4/letter/n/c4cdca/32.png) [@nevar](https://www.finalbuilder.com/forums/u/nevar)
#### Post date: [September 19, 2013, 12:59pm UTC](https://www.finalbuilder.com/forums/t/team-foundation-unmap-working-folder-error-property-not-found-servername/2199/5 "2013-09-19T12:59:14Z")

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Hi Ingrid,   
  
 A property was being used for the unmap which shouldn’t have been. With recent updates to TFS I implemented a change to allow the specification of the collection for some commands. This made its way into the unmap which it shouldn’t have, and wasn’t actually fully implemented. I have also fixed the gap in our process which allowed this regression to occur.   
  
 Apologies for any downtime this caused.