Double check your spreadsheet column names against what you've renamed them in Ultradox (if you did) and what names your variables using in your template. Things won't work properly if the names don't match.
I know that in the past whenever I edited my form, the spreadsheet column names would default to the form questions and break the workflow. Before I knew about renaming the columns in the building block, my fall back was to copy the properly named columns and past that row onto a blank tab in my worksheet so that I could replace the column names if I needed to in the future.
Although, now that I've renamed the columns within the building block, they are still showing up as the default form questions in my spreadsheet. However, when I go to the template and open the template editor, I see the renamed variables and the workflow works.
Hope this helps with your troubleshooting, my processes are pretty straightforward with little to no calculations.
Reach out to the Google+ Community as well as the Forum if you still need help. Good luck!
-Christina