Getting following error while creating diff.

Diff Parse Exception: Expected a hunk header, like 'Index: /path/to/file.ext' (svn), 'Property changes on: /path/to/file.ext' (svn properties), 'commit 59bcc3ad6775562f845953cf01624225' (git show), 'diff --git' (git diff), '--- filename' (unified diff), or 'diff -r' (hg diff or patch). >>> 1 arc diff --rr paramm --verbatim