[nmh-workers] [mhical] accepting google calendar meeting invitation

[nmh]

>From google calendar I invited a non gmail account of mine ( on a linux vps
using sendmail ) that I read with nmh to a "test meeting".

Using nmh, I replied to the gmail message, with a modified "invite.ics" 
attached,
where "invite.ics" is from

    mhical -reply accept  < .../invite.ics > /tmp/invite.ics
        # .../invite.ics is from the google calendar invite email.

The result, shown in the gmail received,  was that google "could not find the 
event".

Any tips on how I can convince google calendar that I have accepted
the meeting invite?

--
thanks,
Tom