I am getting a javascript error on a sail form called : Cannot create context fo

this is happening inside a grid saveInto. Basically I am doing the following:
saveInto:{local!gridselection,
ri!something << rule!APN_returnFirstInput(index(_, "selected", null), _)
}

This is the place where it is erroring out. I don't see any problem doing this. Can anybody suggest anything.

Hello, try the index(_, "selected", null) call without the return first input. You don't need to discard the value since you are using it.

ri!something << index(_, "selected", null)

thank you Jesse....that worked...