Issues with using -rollback flag

[santhoshkotte]

I am trying to run the example provided @ https://goldmansachs.github.io/obevo/rollback.html through obevo and it doesn't seem to work.
DB : SQL server
Command used : deploy.bat DEPLOY -sourcePath C:\db_scripts\obevo\src\main\system-config.xml -rollback -env dev -action deploy -deployUserId user -password pwd -noPrompt
I can see that obevo is running in ROLLBACK mode based on the logs but it doesn't drop the column that is tagged under the ROLLBACK section.
can someone point out if there is any problem with the command I am using.
I am using JDK 1.8. It seems to work on JDK 1.6.