Emergency UNIX and Linux Support

The below is my code

in general according to AIX books

To display a detailed report of all errors logged in the past 24 hours, enter:

Code:

 errpt  -a  -s mmddhhmmyy

where the mmddhhmmyy string equals the current month, day, hour, minute, and year, minus 24 hours.

I have tried the same way by modifiying the code as

Code:

errpt -s `date +"%m%d0000%y"` |grep -i error

<Gives the output as per the errors occured in the day>

Code:

errpt -s `date +"%m%d%H00%y"` |grep -i error

What wil this out put give me? will it give me the errors happened in the hour?????

Please reply me.. because I dont have any output here on my screen....