so what called the original BO Form with the single field? A Process?
If with an EDIT, then its still running, hence the "cancel process" msg.
And if so with an EDIT, I'd think because you have some other stuff you need to do after the data entry is finished?
If so, then you prolly want the single field form to Call a Process on SAVE
to continue your stuff.
so a process kicks off data entry (process A),
then after that is chosen, process B continues to save the chosen data and calls the next step