# Error installing 6.1 891
**URL:** https://www.finalbuilder.com/forums/t/error-installing-6-1-891/940
**Category:** Discussion
**Created:** [August 27, 2008, 10:29am UTC](https://www.finalbuilder.com/forums/t/error-installing-6-1-891/940 "2008-08-27T10:29:21Z")
**Posts on this page:** 12
**Page:** 1
### Author:  [@rafael](https://www.finalbuilder.com/forums/u/rafael)
#### Post date: [August 27, 2008, 10:29am UTC](https://www.finalbuilder.com/forums/t/error-installing-6-1-891/940/1 "2008-08-27T10:29:21Z")
When installing v6.1, I got the error below:
---------------------------
Setup
---------------------------
Unable to execute file:
C:\Program Files\FinalBuilder 6\VSoft.GACTool.exe
CreateProcess failed; code 14001.
This application has failed to start because the application configuration is incorrect. Reinstalling the application may fix this problem.
---------------------------
OK
---------------------------
The system is XP, it has FB 3 on it. It is our build system.
This error occurred during the "registering MSBuild Task" message, when the progress bar showed everything was complete.
What to do?
(And, fwiw, we will be needing MSBuild support in FB6 !)
Thanks!!
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### Author:  [@rafael](https://www.finalbuilder.com/forums/u/rafael)
#### Post date: [August 27, 2008, 10:34am UTC](https://www.finalbuilder.com/forums/t/error-installing-6-1-891/940/2 "2008-08-27T10:34:06Z")
more info:
addl err:
---------------------------
Setup
---------------------------
Unable to execute file:
C:\Program Files\FinalBuilder 6\VSoft.GACTool.exe
CreateProcess failed; code 14001.
This application has failed to start because the application configuration is incorrect. Reinstalling the application may fix this problem.
---------------------------
OK
---------------------------
---
### Author:  [@rafael](https://www.finalbuilder.com/forums/u/rafael)
#### Post date: [August 28, 2008, 3:33am UTC](https://www.finalbuilder.com/forums/t/error-installing-6-1-891/940/3 "2008-08-28T03:33:28Z")
Any advice on this?
One of the main things we will be doing is using msbuild from FB6…
Please advise as to next steps!
Thanks!
---
### Author:  [@Vincent](https://www.finalbuilder.com/forums/u/Vincent)
#### Post date: [August 29, 2008, 2:06am UTC](https://www.finalbuilder.com/forums/t/error-installing-6-1-891/940/4 "2008-08-29T02:06:30Z")
Do you have the .NET Framework 2.0 installed on the machine?
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### Author:  [@Vincent](https://www.finalbuilder.com/forums/u/Vincent)
#### Post date: [August 29, 2008, 2:11am UTC](https://www.finalbuilder.com/forums/t/error-installing-6-1-891/940/5 "2008-08-29T02:11:41Z")
Hi
You may also need to install XP SP2 or SP3.
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### Author:  [@rafael](https://www.finalbuilder.com/forums/u/rafael)
#### Post date: [August 29, 2008, 2:57am UTC](https://www.finalbuilder.com/forums/t/error-installing-6-1-891/940/6 "2008-08-29T02:57:43Z")
Do you have the .NET Framework 2.0 installed on the machine?
Yes, of course!
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### Author:  [@rafael](https://www.finalbuilder.com/forums/u/rafael)
#### Post date: [August 29, 2008, 3:00am UTC](https://www.finalbuilder.com/forums/t/error-installing-6-1-891/940/7 "2008-08-29T03:00:08Z")
You may also need to install XP SP2 or SP3.
Ahhhh. Our build box is clean XP.... no SP of any kind on it.
Once we get the SP on there, what do we do?
(uninstall and reinstall?)
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### Author:  [@rafael](https://www.finalbuilder.com/forums/u/rafael)
#### Post date: [August 29, 2008, 3:07am UTC](https://www.finalbuilder.com/forums/t/error-installing-6-1-891/940/8 "2008-08-29T03:07:44Z")
Could this happen if MSBuild itself is not on the system?
(We haven’t put it there yet…!)
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### Author:  [@Vincent](https://www.finalbuilder.com/forums/u/Vincent)
#### Post date: [August 29, 2008, 3:11am UTC](https://www.finalbuilder.com/forums/t/error-installing-6-1-891/940/9 "2008-08-29T03:11:26Z")
Yes, since our assemblies reference the msbuild ones.
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### Author:  [@rafael](https://www.finalbuilder.com/forums/u/rafael)
#### Post date: [August 29, 2008, 3:13am UTC](https://www.finalbuilder.com/forums/t/error-installing-6-1-891/940/10 "2008-08-29T03:13:18Z")
Yes, since our assemblies reference the msbuild ones.
Ahhhhhhhhhhhhhhhhhhh.
Might want to have the old installer test for that....
We will throw MSBuild on there tomorrow (heading home just now).
Then we should uninstall/reinstall FB, yes?
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### Author:  [@Vincent](https://www.finalbuilder.com/forums/u/Vincent)
#### Post date: [August 29, 2008, 3:30am UTC](https://www.finalbuilder.com/forums/t/error-installing-6-1-891/940/11 "2008-08-29T03:30:10Z")
If you have the .NET framework installed then msbuild should already be installed.
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### Author:  [@rafael](https://www.finalbuilder.com/forums/u/rafael)
#### Post date: [August 29, 2008, 3:56am UTC](https://www.finalbuilder.com/forums/t/error-installing-6-1-891/940/12 "2008-08-29T03:56:46Z")
If you have the .NET framework installed then msbuild should already be installed.
This box has .NET 2.0, but not anything newer. Our guess is that MSBUILD is in .NET 3.x, but not 2.0... ?
Anyway, will dig into that area tomorrow.