Silverlight Debugging - .loadby sos coreclr Unable to find module ‘coreclr’, Failed to find runtime DLL (mscorwks.dll), 0×80004005 Extension commands need mscorwks.dll
0:000> .loadby sos mscorwks
Unable to find module ‘mscorwks’
0:000> .loadby sos coreclr
Unable to find module ‘coreclr’
0:000> .load C:\Program Files\Microsoft Silverlight\2.0.40115.0\sos.dll
0:000> !clrstack
Failed to find runtime DLL (mscorwks.dll), 0×80004005
Extension commands need mscorwks.dll in order to have something to do.
unable to find mscorwks.dll means there is no clr host but if you do encounter this issue while debugging Silverlight application running in IE or any browser, verify the followings
1. Have you attached WinDbg to the correct browser’s process id?
2. Have you taken the memory dump of the process running silverlight?
If you are using IE8, it runs the tabbed browser as a child process so you will see 2 instances of iexplore.exe running. You can use Process Explorer to identify which process has loaded the coreclr.dll or agcore.dll(silverlight runtime). See the Snapshot below
Process Explorer snapshot of IE without Silverlight Runtime
Process Explorer snapshot of IE with Silverlight Runtime
Tags: Silverlight
