I was trying to read the DNS log file but was given an error of "WARNING input file does not exist", and it also depends on the directory that the file was in, here were the results. It appears that Windows was restricting the read permissions based on the residing (system?) directories, any idea?
On one server:
C:\Windows\System32\dns\dns.txt - Error
C:\dns.txt - No error
C:\Windows\Temp\dns.txt - No error