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CLR20r3 FileNotFoundException Server 2008

Posted on 2013-07-01
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Last Modified: 2013-07-03
I have a .NET application which has been running fine for years (built for framework 3.5) on assorted Windows OS versions, . It is however failing on Server 2008 systems with error:

Problem signature:
  Problem Event Name:      CLR20r3
  Problem Signature 01:      myapp.exe
  Problem Signature 02:      4.10.5.33718
  Problem Signature 03:      5127bc6c
  Problem Signature 04:      MyApp
  Problem Signature 05:      4.10.5.33718
  Problem Signature 06:      5127bc6c
  Problem Signature 07:      d3
  Problem Signature 08:      53
  Problem Signature 09:      System.IO.FileNotFoundException
  OS Version:      6.0.6002.2.2.0.272.7

The test-bed Server 2008 system has Framework 4 installed. If I rebuild my application for framework 4 it runs OK.  I "could" deploy a new version of my app to work with version 4, but rather than having to upgrade existing customers running framework 3.5, I'd like to understand why a 3.5 app is failing where framework 4 is present. Do I need to perform any additional steps on Server 2008 to address this problem?
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Question by:brenlex
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Accepted Solution

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Patrick Bogers earned 500 total points
ID: 39291076
Hi,

.Net 3.5 and 4.0 run aside so you need to install 3.5 to your 2008 server. Pretty sure this wil solve your problem.
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Author Comment

by:brenlex
ID: 39291669
Thanks. I suspected this, however I have another program running on the system, also built for 3.5, which runs OK. Could it be a specific framework file which is required by one app and not the other?
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LVL 22

Expert Comment

by:Patrick Bogers
ID: 39292212
Hi,

I dont know the program so i am afraid i can not say anything about it.
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Author Comment

by:brenlex
ID: 39294033
I tried loading framework 4.5... and my app still failed. I thought 4.5 incorporated all the frameworks to date?

Note: I also tried 3.5.1 afterwards, which worked -- I just don't understand why 4.5 has not. Any insight?
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LVL 22

Expert Comment

by:Patrick Bogers
ID: 39294056
Hi.

Please think of any newer release as an addition of the previous version.
glad to see you did find the solution.
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