Resetting SOME form values after a data change

I am struggling to implement the following functionality:

• I have a form with multiple fields and lables
• I have a radio list with 2 options (yes/no) partway down the form (its a vertical stack form)
• When the user selects yes or no I need to:
  • Reset the values in certain inputs in the form to null (they are all currency inputs)

Ive tried doing this with a data flow so far, following these steps:

• Create a data flow with just a start and a done, nothing else
• Add an input from the the radio list that triggers the change
• Add an output variable that just has a value of null
• Map this output variable to the input in the form

This doesnt work when the output from the data flow is a constant of null, however it DOES work if I set it to 0, but unfortunately that isnt what I need. To clarify I have set Allow Null both on the data output variable, and on the input on the form but this has no effect.

A potential alternative solution is to just reset the whole form - but I cant see any way to do this either! The only thing in the docs about resetting a form is to use a post back button or something, but thats not what I need.

Anyone any ideas?

[quote=faiza@decisions.com]It seems the "allow Null" function is not working on the "Currency box" component of a Form.
I will open a support ticket, so we can discuss this further.[/quote]

Thanks a lot - I thought that could be the issue. Any idea on when this will be resolved?