I am using a trusted application that extracts attachments from messages,
then adds a field value to indicate that the attachments have been extracted
from the message. This works effectively, but I have run into a problem
updating fields on some of the messages in a specific account. When I
attempt to add the field to these messages, I get the error "Attempt to
write to read-only field collection".

I have checked the obvious - the account contains the field definition, the
field definition is not read only, the incoming data is of the right type
(string) and the field length is sufficient to contain the incoming data,
and the messages are simple vanilla messages of type GW.MESSAGE.MAIL that do
not have the delete flag set. The Fields collections on the messages are
currently empty.

Any ideas what else I can check?


Dave M