Lync Connectivity Analyzer fails to open

By | July 18, 2013

I came across an issue where a fresh install of the Lync Connectivity Analyzer ( ) on Server 2012 wouldn’t launch. Looking in the Event Viewer I found the following errors.

Event: ID 1026
Source .Net Runtime
Application: LyncConnectivityAnalyzer.exe
Framework Version: v4.0.30319
Description: The process was terminated due to an unhandled exception.
Exception Info: System.InvalidOperationException

Event: ID 1000
Source: Application Error
Faulting application name: LyncConnectivityAnalyzer.exe, version: 5.0.8308.289, time stamp: 0x5113842c
Faulting module name: KERNELBASE.dll, version: 6.2.9200.16451, time stamp: 0x50988aa6
Exception code: 0xe0434352

I tried the Lync Connectivity Analyzer on my Windows 8 desktop (known to be working) and had the same issue.

System Requirements for the Lync Connectivity Analyzer
•Windows 7 Service Pack 1, Windows 8, Windows Server 2008 R2 SP1, Windows Server 2008 Service Pack 2, Windows Server 2012, Windows Vista Service Pack 2
•Microsoft .NET Framework 4.5

This led me to believe a patch for .NET 4.5 might be the cause. After removing the July patches KB2840632 & KB2833958, I was able to launch the Analyzer again. Another user reported that just removing KB2840632 will resolve the issue.

Details of the KB2840632 Security Update:

Updated Lync Connectivity Analyzer:

7 thoughts on “Lync Connectivity Analyzer fails to open

    1. KCizzle

      Thank you for the above comment. Correction though:

      On Windows 7 remove KB2840642 & KB2840642V2

  1. Mornay

    This didn’t work on Win7 or Win8 as I don’t have either of these updates installed.

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