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While trying to troubleshoot an IIS error I came upon a guide that discussed the error code in the IIS log.

The 4 server logs you NEED to know to fix any IIS / ASP.NET error

The post uses the following excerpt from an IIS log file ...

2013-06-16 03:39:19 ::1 GET /test.aspx mincase=80 80 - ::1 - 500 16 0 3173

The article goes on to say that the 500 represents the status code while the 16 is the substatus code. However, when I try and search for the status code via Google, I always see it referred to as 500.16. Is this essentially two different ways to reference the same error code? Is there a difference between and 500 16 and 500.16?

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Two different ways of saying the same thing, yes.

For what it's worth, the 500.16 way of doing it is preferable, for being easier to search and organize, and a lot of error codes are done this way, for the same reason. http error codes, for example.

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