I'm doing the exact same thing with a zipped file geodatabase and it's giving me errors.
Attempting to create table 'XXXXXXX' with 'geodb_type' set to 'geodb_metadata'. FME features of 'geodb_metadata' can only be written to existing tables. If intending to write metadata, please ensure the table already exists. If intending to create a new table, ensure the 'geodb_type' is set to a valid table type. A fatal error has occurred. Check the logfile above for details
I've checked all my parameters and they are the same between my zipped and non-zipped file geodatabase.
Any idea why?
Thanks