Receiving Sil Program Exception: "The "getInput" routine can only be used in validators

[Nannette Mori]

The sil script is a validator so I don't understand why I am getting that exception

Snippet of Code:

string dateRequired = #{Date Required?};

if(getInput(dateRequired == "YES")){

    if(hasInput(customfield_XXXX))

  {

    return false, customfield_XXXX, "Receiver Required Date must be filled out";

 }

I am getting the sil exception on the following line

if(getInput(dateRequired == "YES"))