Thanks for your reply. Yes, I have create a test scenario making sure there is some data; your queries give indeed some result.

Also when I just execute this ...

EXEC msdb..sp_dbmmonitorresults

@database_name = 'NAV_Mirroring'

,@mode = 0

,@update_table = 1

... I get/see the desired data. But now I want to save this into a #table; but when I try this, I get this "nesting INSERT EXECUTE" error ...

But maybe there would be a different way? Actually all this is to finally read the "time_behind"!

Is there an easier way to retrieve this info?