In researching this error, the general consensus was that it occurs when using a poorly written client that did not terminate correctly, but was nothing to worry about.
However, I am unable to import the ldif file that I included in my first post.
Any ideas what I should be looking for?
In response to one reply, yes /usr/lib/ldap/back_hdb.la does exist.
I haven't a build with backends built as modules handy; I have tried a modification like yours that loads another module and it works as intended, so I have no clue.
If you could successfully run any of the tests that actually load modules and use them (e.g. test022, test049, test050, test052, test053, test05-9 then you should check how they loaded the modules and find out yourself what the error is.
p.