Is there any thing wrong with the following? setenv PATH `echo $PATH | sed "s;$OLDNAME/bin;$NEWNAME/bin;g"` When I type this in csh under sco xenix 386 I get the error ``:bus error interestingly enough the following does work. setenv DIRT `pwd | sed "s;a;e;g"` Does anyone have any ideas? Frank Paterra paterra at cs.odu.edu