I just found I have the same problem on a DEC Alpha OSF3.2.
Was OK before the upgrade. I am owner of the files and
stringsearch does not work for me or root.
The *.seqcat files are world readable.
The output looks like:
! STRINGSEARCH from: genpept October 30, 1997 13:58
! searching for: "glycosylase" ..
! Sequences searched: 0
Christopher W Botka Phone: (415)476-5379
Sequence Analysis Consulting Service Fax: (415)502-1755
UCSF Computer Graphics Lab Office: Lib-111
Internet: botka at cgl.ucsf.ed Mail Drop: Box 0446
http://www.sacs.ucsf.edu/ NeXT/MIME mail OK