This pattern is mostly useful when an exception thread is not present in the dump like in this rare example:
ERROR: Unable to find system thread 9B7E ERROR: The thread being debugged has either exited or cannot be accessed ERROR: Many commands will not work properly This dump file has an exception of interest stored in it. The stored exception information can be accessed via .ecxr. ERROR: Exception C0000005 occurred on unknown thread 9B7E (95f4.9b7e): Access violation - code c0000005 (first/second chance not available)
.ecxr command will not work here but the exception record is available via .exr command:
0:???> .exr -1 ExceptionAddress: 08a9ae18 (DllB.dll+0x001cae18) ExceptionCode: c0000005 (Access violation) ExceptionFlags: ...