Hi John, I wonder if you could fill in a bit of information concerning the limitations and requirements of the Custom Log? -max number of fields -limits on field names (I have had a couple of errors about "XXX YYY is not a valid component name") -computations done on fields and passed back to the log: ie distance and bearing from lat+long -is it possible to make changes to the custom log database structure after it has been created? Thanks, Shaun Merrigan -- smerriga@xxxxxxxxxxxxxxxx