Here's a part of the output for errno 329 from the finderr utility:
If you are using INFORMIX-SE, the visible databases are directories
with names in the form dbname.dbs. You must be able to read from and
write to them. The database server looks first in the current working
directory and then in each directory named in the DBPATH environment
variable. The most common cause of this error is an incorrect setting
or no setting for the DBPATH environment variable.