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Similar to monitoring errors from surveys, the following query may be used to report on the number of errors recently generated by Authoring:
select count (id) as count
from [confirmlog]..[reportmonitor] with (nolock)
where errorflag<>0
and performed > dateadd(mi,-10,getdate())
and context=2
Changing the context value from 2 to 3 will give results for Express while omitting the context altogether will return both Authoring and Express results.