[monit] Monitor timestamp only and not existence of file

[Rishad Omar]

Hello,
        
        
I'd like to monitor the timestamp of a file and execute my command when
the file is 'old'. But I don't want to be alerted if the file exists nor
if the the file doesn't exist. 
That is, I want to be alerted ONLY if the file exists and is older than
10 mins.
        
The following works fine with the timestamp but in addition I get
alerted when the file exists and then later that it doesn't exist.
        
        check file lock path /some/path/lock
                if timestamp > 10 minutes
                    then exec "/some/command"
        
I tried the following, but it hasn't helped:
        
        check file lock path /some/path/lock
                start program = "/bin/touch /tmp/1.1"
                if timestamp > 10 minutes
                    then exec "/some/command"
        
Thanks, Rishad