I just automatically updated my Fiddler to v4.6.20171.7553 and now I'm getting exceptions when I start fiddler:
Unhandled exception... Field not found: 'Fiddler.FiddlerApplication.scriptRules'
I realized that it was failing to load my FiddlerScript tab. I renamed the file RulesTab2.dll so I can start fiddler without the error now, but I can no longer conveniently customize my rules. Is there a fix for this?
Here are the details from the exception:
See the end of this message for details on invoking just-in-time (JIT) debugging instead of this dialog box.
************** Exception Text ************** System.MissingFieldException: Field not found: 'Fiddler.FiddlerApplication.scriptRules'. at RulesTab2.RulesTab2.EnsureReady() at RulesTab2.RulesTab2.tabsViews_SelectedIndexChanged(Object sender, EventArgs e) at System.EventHandler.Invoke(Object sender, EventArgs e) at System.Windows.Forms.TabControl.OnSelectedIndexChanged(EventArgs e)
at System.Windows.Forms.TabControl.WmSelChange() at System.Windows.Forms.TabControl.WndProc(Message& m) at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)************** Loaded Assemblies ************** mscorlib Assembly Version: 4.0.0.0 Win32 Version: 4.6.1586.0 built by: NETFXREL2 CodeBase: file:///C:/Windows/Microsoft.NET/Framework64/v4.0.30319/mscorlib.dll ---------------------------------------- Fiddler Assembly Version: 4.6.20171.7553 Win32 Version: 4.6.20171.7553 CodeBase: file:///C:/Program%20Files%20(x86)/Fiddler2/Fiddler.exe ---------------------------------------- System.Core Assembly Version: 4.0.0.0 Win32 Version: 4.6.1586.0 built by: NETFXREL2 CodeBase: file:///C:/windows/Microsoft.Net/assembly/GAC_MSIL/System.Core/v4.0_4.0.0.0__b77a5c561934e089/System.Core.dll ---------------------------------------- System Assembly Version: 4.0.0.0 Win32 Version: 4.6.1586.0 built by: NETFXREL2 CodeBase: file:///C:/windows/Microsoft.Net/assembly/GAC_MSIL/System/v4.0_4.0.0.0__b77a5c561934e089/System.dll ---------------------------------------- System.Windows.Forms Assembly Version: 4.0.0.0 Win32 Version: 4.6.1586.0 built by: NETFXREL2 CodeBase: file:///C:/windows/Microsoft.Net/assembly/GAC_MSIL/System.Windows.Forms/v4.0_4.0.0.0__b77a5c561934e089/System.Windows.Forms.dll ---------------------------------------- System.Drawing Assembly Version: 4.0.0.0 Win32 Version: 4.6.1586.0 built by: NETFXREL2 CodeBase: file:///C:/windows/Microsoft.Net/assembly/GAC_MSIL/System.Drawing/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Drawing.dll ---------------------------------------- Telerik.Analytics Assembly Version: 4.0.104.0 Win32 Version: 4.0.104 CodeBase: file:///C:/Program%20Files%20(x86)/Fiddler2/Telerik.Analytics.DLL ---------------------------------------- Xceed.Zip.v5.4 Assembly Version: 5.4.13572.13590 Win32 Version: 5.4.13572.13590 CodeBase: file:///C:/Program%20Files%20(x86)/Fiddler2/Xceed.Zip.v5.4.DLL ---------------------------------------- Xceed.Compression.Formats.v5.4 Assembly Version: 5.4.13572.13590 Win32 Version: 5.4.13572.13590 CodeBase: file:///C:/Program%20Files%20(x86)/Fiddler2/Xceed.Compression.Formats.v5.4.DLL ---------------------------------------- Xceed.FileSystem.v5.4 Assembly Version: 5.4.13572.13590 Win32 Version: 5.4.13572.13590 CodeBase: file:///C:/Program%20Files%20(x86)/Fiddler2/Xceed.FileSystem.v5.4.DLL ---------------------------------------- Xceed.Compression.v5.4 Assembly Version: 5.4.13572.13590 Win32 Version: 5.4.13572.13590 CodeBase: file:///C:/Program%20Files%20(x86)/Fiddler2/Xceed.Compression.v5.4.DLL ---------------------------------------- System.Configuration Assembly Version: 4.0.0.0 Win32 Version: 4.6.1586.0 built by: NETFXREL2 CodeBase: file:///C:/windows/Microsoft.Net/assembly/GAC_MSIL/System.Configuration/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Configuration.dll ---------------------------------------- System.Xml Assembly Version: 4.0.0.0 Win32 Version: 4.6.1586.0 built by: NETFXREL2 CodeBase: file:///C:/windows/Microsoft.Net/assembly/GAC_MSIL/System.Xml/v4.0_4.0.0.0__b77a5c561934e089/System.Xml.dll ---------------------------------------- Standard Assembly Version: 2.6.2.0 Win32 Version: 2.6.2.0 CodeBase: file:///C:/Program%20Files%20(x86)/Fiddler2/Inspectors/Standard.dll ---------------------------------------- SyntaxView Assembly Version: 2.6.2.0 Win32 Version: 2.6.2.0 CodeBase: file:///C:/Program%20Files%20(x86)/Fiddler2/Inspectors/SyntaxView.dll ---------------------------------------- FInstStudio Assembly Version: 1.0.0.0 Win32 Version: 1.0.0.0 CodeBase: file:///D:/Documents/Fiddler2/Scripts/FInstStudio.dll ---------------------------------------- HtmlAgilityPack Assembly Version: 1.4.0.0 Win32 Version: 1.4.0.0 CodeBase: file:///D:/Documents/Fiddler2/Scripts/HtmlAgilityPack.dll ---------------------------------------- Geoedge Assembly Version: 1.2.5.0 Win32 Version: 1.2.5.0 CodeBase: file:///C:/Program%20Files%20(x86)/Fiddler2/Scripts/Geoedge.dll ---------------------------------------- RulesTab2 Assembly Version: 2.6.2.0 Win32 Version: 2.6.2.0 CodeBase: file:///C:/Program%20Files%20(x86)/Fiddler2/Scripts/RulesTab2.dll ---------------------------------------- SimpleFilter Assembly Version: 2.6.2.0 Win32 Version: 2.6.2.0 CodeBase: file:///C:/Program%20Files%20(x86)/Fiddler2/Scripts/SimpleFilter.dll ---------------------------------------- Timeline Assembly Version: 2.6.0.3 Win32 Version: 2.6.0.3 CodeBase: file:///C:/Program%20Files%20(x86)/Fiddler2/Scripts/Timeline.dll ---------------------------------------- Microsoft.JScript Assembly Version: 10.0.0.0 Win32 Version: 14.6.1586.0 built by: NETFXREL2 CodeBase: file:///C:/windows/Microsoft.Net/assembly/GAC_MSIL/Microsoft.JScript/v4.0_10.0.0.0__b03f5f7f11d50a3a/Microsoft.JScript.dll ---------------------------------------- System.Windows Assembly Version: 4.0.0.0 Win32 Version: 4.6.1586.0 CodeBase: file:///C:/windows/Microsoft.Net/assembly/GAC_MSIL/System.Windows/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Windows.dll ---------------------------------------- JScript Thunk Assembly Assembly Version: 0.0.0.0 Win32 Version: 14.6.1586.0 built by: NETFXREL2 CodeBase: file:///C:/windows/Microsoft.Net/assembly/GAC_MSIL/Microsoft.JScript/v4.0_10.0.0.0__b03f5f7f11d50a3a/Microsoft.JScript.dll ---------------------------------------- YHuHIz5c Assembly Version: 0.0.0.0 Win32 Version: 14.6.1586.0 built by: NETFXREL2 CodeBase: file:///C:/windows/Microsoft.Net/assembly/GAC_MSIL/Microsoft.JScript/v4.0_10.0.0.0__b03f5f7f11d50a3a/Microsoft.JScript.dll ---------------------------------------- Microsoft.mshtml Assembly Version: 7.0.3300.0 Win32 Version: 7.0.3300.0
CodeBase: file:///C:/windows/assembly/GAC/Microsoft.mshtml/7.0.3300.0__b03f5f7f11d50a3a/Microsoft.mshtml.dll
************** JIT Debugging ************** To enable just-in-time (JIT) debugging, the .config file for this application or computer (machine.config) must have the jitDebugging value set in the system.windows.forms section. The application must also be compiled with debugging enabled.
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Answering my own question: I tried installing Fiddler fresh and now it works fine. Apparently the install didn't work right the first time, perhaps because I accidentally started it twice?