Just one mail when a trigger is hit all night

[waardd]

One of our triggers is a trigger that monitores the number of errors in a file.
It is configured as followed:

{RCHK:APPLOG.RCHK.ERROR.last(0)}>10 & {RCHK:APPLOG.RCHK.ERROR.avg(300)}>5

This trigger generated one mail at the beginning of the disturbence but the disturbence was during the whole night (about 8 hours) and i would expect more then 1 mail.
I expected 1 mail per check...

Why is it that i only get one mail?

[Atsushi]

If you want to generate a trigger each time at you got the value,
please try to check 'Multiple PROBLEM events generation' the trigger settings.

If it is not checked, the trigger event does not occur during trigger status is fail.