When the debug session was being closed, the debugger was unable to set the Microsoft® Internet Information Server (IIS) application's debug flags to the state they were in when the session started.
This can result in the debugger remaining enabled, and in the IIS application remaining set to run out of process.
Use the IIS management utility (MMC) to set the application's debug and out of process options to their earlier state.
For details about server debugging options, see Debugging Server Script.