What is wrong with this search?  The archives contain both hypertext
and hypermedia, some in the same postings.  I'm looking for any
occurence of hyper where it is not part of either word.

> s hyper not (hypertext or hypermedia) in autocat
Invalid search expression - stack not empty after final evaluation.

Get the same thing for this one:

> s hyper not hypertext in autocat
Invalid search expression - stack not empty after final evaluation.

Douglas