sed error "unescaped newline inside substitute pattern"

[Nikos Vassiliadis]

David Banning wrote:
> I have looked at the file in vi but the problematic characters are 
> invisible there.

The problematic character is the newline character, \n, ASCII 0xA.

And, yes vi is old but it's a few months now that it supports newlines
without problems;)

Nikos