Can you run the DOS equivalent of this Unix command from the command line:
$ echo "On this date @chk_date@ I created the string" | \ sed 's/@chk_date@/November 20, 2003/g' On this date November 20, 2003 I created the string
Turns out to be the same command :)
lyx\bin>echo "On this date @chk_date@ I created the string" | sed ' s/@chk_date@/November 20, 2003/g'
works ok with the output
"On this date November 20, 2003 I created the string"
But doc/LaTeXConfig.lyx is still an empty file, with the sed error reported earlier during configure.
Thanks, Milos