Hi All,
I updated my default as follows,

# Unison preferences file
root = /root/shibu/copy/file1.txt
root = ssh://hostname//root/shibu/copy/file1.txt

# Unison preferences file
merge = diff3 -m CURRENT1 OLD CURRENT2 > NEW
backuplocation = local
backupsuffix = .$VERSION
maxbackups = 5

But I'm getting the error Fatal error: File "default.prf", line 4: bad pattern: diff3 -m CURRENT1 OLD CURRENT2 > NEW
A pattern must be introduced by one of the following keywords:
Name, Path, or Regex.
Can any one help me to rectify this