input fields aren't accessible in Import Data tasks

input fields aren't accessible in Import Data tasks

  1. BrandModels = (Model[Brand == input.Brand].Name_utilized).getall();
  2. if(BrandModels.contains(input.Name_utilized))
  3. {
  4. alert ("Duplicate Brand - Model pair!");
  5. cancel submit;
  6. }
That simple validation works perfect in form but ends up with error on Import Data.
While debugging I came up to conclusion that no "input" is accessible because if you try to:
  1. test = input.Brand;
... it crashes with same error.


How should I validate Imported Data if I cant access it via input?
Any Ideas?