eCart crashing when discount added

I'm getting a consistent crash when adding a discount rule to eCart. I'm running version 5.0.7 on DW CS6. I'm trying to give 15% off the sub-total if one of 3 different items is in the cart.
My steps:
1. Open eCart object.
2. On Discount tab, name discount "Flash Sale" (I also tried "Flash-Sale")
3. For triggers choose when specific item is in cart. Use OR to identify items with ID # 1, 2, and 3.
4. For calculation, choose Apply to subtotal. Make is Minus 15%. (I also tried times .15)
5. Click OK.

The edit dialog disappears and I see the beach-ball for about 30 seconds and then a crash. I'm 3 for 3 now.

What to do? If possible, I'd rather not upgrade to version 6 at this time - just looking for a quick fix to get this up and running for client.

Thanks!

Try adding the rule named "Flash Sale" with simple calculations and triggers... just one line, make it as simple as possible so that hopefully it will apply.

Then manually go into the cart object .php file and update the rule manually using the code I've provided below:

//eCart Rule
function WAEC_eCart1_FlashSale()  {
  $totalDiscount = 0;
  if (true && (($this->InCart("1") == true) || ($this->InCart("2") == true) || ($this->InCart("3") == true))) {
    $totalDiscount += ($this->TotalColumn("TotalPrice") * 0.15);//Result
  }
  return WA_eCart_FormatNumber($totalDiscount, $this->ForceDecimalsC, $this->DecimalPlacesC);
}
//eCart Rule

It's crashing just after adding a new discount named "Flash Sale" and accepting the default entries. Can I just add that code block to the eCart object .php file? I've included the current one, just in case there's something hinky there.

Yes, you can just add that code, but you would also have to add this on line 79:

$this->Discounts[] = new WA_eCart_Rule(urldecode("Flash%20Sale"), true, "WAEC_eCart1_FlashSale");

Thanks, Ray - that did it. So, if I upgrade to eCart 6, will I have to redo any of the cart I did in eCart 5?

If you update the cart object you also have to update the cart display... or at least the updatable fields in your cart. I did confirm that I was able to open and edit your cart in eCart 6.