File Name Validation

Hi, everyone!

I have a problem, I'm designing an interface where you can attach a file but the file must have a nomenclature.

Example:

INVENTARIO (always) PRESENT MONTH PRESENT YEAR

INVENTARIO DIC 2023

But I tried with the follow code:

a!localVariables(
  local!var: {
    "ENERO",
    "FEB"
  },
  local!var2;
  {
    a!fileUploadField(
      saveInto: local!var2,
      value: local!var2,
      label: "File Upload",
      labelPosition: "ABOVE",
      validations: {
        if(
          fv!files.name = {"INVENTARIO" & upper(tostring(datetext(today(), "MMM"))) & upper(tostring(datetext(today(), "YYYY")))},
          {
          "Ingrese un documento nombrad correctamente."
        ),
      }
    )
  }
)

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