>Ok, with IN mytable everything works fine. Thanks god, I have a goapp.io_replace function, it will be a only one change for my app! :)) And also I find this (well now) in the help.

Wow, that is fortuante! Also, instead of:

REPLACE mitable.field WITH ... IN mitable

You can do:

REPLACE field WITH ... IN mitable

if it helps, there is no need for the alias name when you use IN/