Getting error when setting the Active Business Process Flow as the current BPF.

I have added a JavaScript to the 'form properties' to change the Business Process Flow to active Process, But I'm getting below error. What may be the issue? 

"One of the scripts for this record has caused an error. For more details, download the log file.
ReferenceError: setBPFStatus is not defined at eval (eval at RunHandlerInternal "

Thanks In Advance