What type of graphics are you viewing? CGM
Do you have the Arbortext Editor preference variables set, isoviewfileformats and creoviewfileformats?
set isoviewfileformats=iso;isoz;edz;pvz;cgm
set creoviewfileformats=edz;pvz;
What version of Arbortext Editor are you using? 6.1 M070
What version of CreoView and IsoView? Creoview 3.0 and Isoview 7.3