Hi 0jim,
When an attribute is used in directory, an internal reference (attribute identifier) is added to the grid file. The reference remains even when all values for that attribute have been removed.
The only way to remove this reference is to:
* stop the DSA
* dump the datastore to LDIF via dxdumpdb
* grep the dumped LDIF file to ensure there are no other occurrences of the attribute
* remove the attribute from your directory schema
* load the dumped LDIF via dxloaddb
* Start the DSA
Hope that helps!
Thanks,
Justin