Howto: fix CLR20r3 error in SyncToy.exe on Windows Vista


I was trying to use Microsoft’s SyncToy utility to backup some of my data on my Windows Vista 64-bit pc, but the program kept crashing with the following error:

Problem signature:
Problem Event Name: CLR20r3
Problem Signature 01: synctoy.exe
Problem Signature 02: 1.4.0.0
Problem Signature 03: 453f990b
Problem Signature 04: SqmManagedWrapper
Problem Signature 05: 1.4.0.0
Problem Signature 06: 453f9909
Problem Signature 07: 8
Problem Signature 08: 38
Problem Signature 09: System.BadImageFormatException
OS Version: 6.0.6000.2.0.0.256.1
Locale ID: 3081

I knew I was running a Windows Vista compatible version of SyncToy, so I figured it must be a Windows Vista compatibility issue. I found Josh’s post which describes his solution for the problem – installing Microsoft Network Monitor 3.0.

Josh resolved this error by copying custsat.dll, which is installed by Network Monitor, into the SyncToy installation directory (C:\Users\YourLoginName\AppData\Local\SyncToy). Once I replaced the existing custsat.dll with the version installed with Network Monitor 3.1, SyncToy started right up without a problem.

4 Responses to “Howto: fix CLR20r3 error in SyncToy.exe on Windows Vista”

  1. PC-Rich Says:

    I thought SyncToy was a pretty cool application when I first came across it. Reminded me of the Unix command rsync. However, I got so sick of needing to load .Net every time I was trying to repair an already broken machine…..that’s Microsloth for you!!! I did some searching around and came across the greatest tool since Mosaic! It’s called Allway Sync…it’s totally free and has every option you could ever want for all your data replication needs….and then some!!! Check it out, http://www.allwaysync.com/

  2. ardavan Says:

    Description:
    Stopped working

    Problem signature:
    Problem Event Name: CLR20r3
    Problem Signature 01: mmc.exe
    Problem Signature 02: 6.0.6001.18000
    Problem Signature 03: 47918d09
    Problem Signature 04: Microsoft.Windows.ServerManager
    Problem Signature 05: 6.0.0.0
    Problem Signature 06: 4791a748
    Problem Signature 07: 1f26
    Problem Signature 08: 1f
    Problem Signature 09: System.NullReferenceException
    OS Version: 6.0.6001.2.1.0.256.1
    Locale ID: 1065

  3. karim Says:

    Problem Signature 03: 4a79cedb
    Problem Signature 04: mscorlib
    Problem Signature 05: 2.0.0.0
    Problem Signature 06: 4a7cd8f7
    Problem Signature 07: 12a7
    Problem Signature 08: 14
    Problem Signature 09: System.IO.FileLoadException
    OS Version: 6.0.6000.2.0.0.768.3
    Locale ID: 1033

  4. karim Says:

    Problem signature:
    Problem Event Name: CLR20r3
    Problem Signature 01: hpadvisor.exe
    Problem Signature 02: 3.1.9152.3107
    Problem Signature 03: 4a79cedb
    Problem Signature 04: mscorlib
    Problem Signature 05: 2.0.0.0
    Problem Signature 06: 4a7cd8f7
    Problem Signature 07: 12a7
    Problem Signature 08: 14
    Problem Signature 09: System.IO.FileLoadException
    OS Version: 6.0.6000.2.0.0.768.3
    Locale ID: 1033


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