We have applied Forms 12 to our development environment. I am testing various forms before we deploy 12 to production. This form works in production without errors (Forms 11) but is not working in development.  I have tried several times with different entries where the calculated result is zero or the results is a positive number. Here is the error I get upon submission:  

Field Name: 5) Discount, Position: 35, Error: A parameter was not a valid value. [LFF1004-InvalidParameterValue] [LFF1018-ErrorOccuredDuringFormulaCalculation]

It is a number field and the formula is:  

=IF(AND(Are_you_filing_and_paying_before_the_20th.Yes,Do_any_delinquencies_exist__1.No),V_5__Discount,0.00)

The referenced field:  V_5__Discount is also a number field and the formula there is:  

=MULT(0.03,V_4__Tax_Due)

When I say that it is the same form, I mean it is the exact same form. I uploaded the form and just changed the server connection to know that I would be testing apples to apples. 

EDIT: It may be worth mentioning that V_5__Discount is a hidden field.