Hi Pierre,

The 403 error is different than the 500 error. We usually see the 403 error when there's a problem writing to FileMaker (permissions or modification related). The 500 error we usually see when there's a reading issue, i.e. a parsing error like with the "." date format or a calendarlist record pointing to the wrong layout, etc.

I did get your log as well and responded on the thread you started for the 403 error. Looks like a field modification error:

viewtopic.php?f=33&t=3610&p=9097#p9097

hth,
Jason