What version are you running? RBTools 0.3.4 What's the URL of the page containing the problem? n/a What steps will reproduce the problem? ..try with a single revision.. post-review --revision-range="/vobs/foo/test.py@@/main/mydev/2:/vobs/foo/test.py@@/main/mydev/3" --output-diff ...or multiple revisions.. post-review --revision-range="/vobs/foo/test.py@@/main/mydev/2:/vobs/foo/test.py@@/main/mydev/3;/vobs/foo/test2.py@@/main/mydev/1:/vobs/foo/test2.py@@/main/mydev/3" --output-diff What is the expected output? What do you see instead? Instead of the diffs being generated I get an error saying "There don't seem to be any diffs!" What operating system are you using? What browser? Centos 5 Please provide any additional information below. The problem is the diff_between_revisions code in the ClearCaseClient. According to the docs at http://www.reviewboard.org/docs/manual/dev/users/tools/post-review/ the format of --revision-range should be STARTREV:ENDREV However the code is splitting based on ';' not ':' 1485 def diff_between_revisions(self, revision_range, args, repository_info): 1486 """Performs a diff between passed revisions or branch.""" 1487 1488 # Convert revision range to list of: 1489 # (previous version, current version) tuples 1490 revision_range = revision_range.split(';') 1491 changeset = zip(revision_range[0::2], revision_range[1::2]) 1492 1493 return (self.do_diff(changeset), None) The other thing is the docs don't mention how to format --revision-range for more than one revision. Doing --revision-range=fileAOLDREV:fileANEWREV:fileBOLDREV:fileBNEWREV works but looks odd. As a workaround for this bug I have to use ';' to separate the revisions..