The following simple (and pointless) script results in this error message:
Error 042: EUR/AUD:B parameters not found!
or
Error 042: EUR/AUD:A parameters not found!
Code:
function run() {
  set(TESTNOW+PLOTNOW);
  set(PARAMETERS);
  NumYears = 1;
  LookBack = 334;
  asset("EUR/AUD");

  algo("A");
  var p1 = optimize(150, 1, 333, -33);
  algo("B");
  var p2 = optimize(150, 1, 333, -33);
}

Why? What am I missing?