React to the event for step submitted and store data at that point? Mail or DDS would be my first options. 

Hi Daniel,

Sorry, my question was not very clear. The problem I am facing is: when user enters values in the form fields and clicks on submit, if there is any validation error, the values entered by user is lost. Any suggestion how to persist the values?

Thanks,

Vivek

What do you mean with persist in this case? Save to database or similar or just keep them so user can easily change it?

If you want to save them to database or simliar I would guess implementing your own custom validation. You can do this by inheriting from ElementValidatorBase in that case and then in validate method save the data to your preferred data storage. 

I want to keep values on screen so that user should can change it, and submit the form again.