Having trouble getting mag cards to work for gift cards

I followed a tutorial that requires gift cards to start with GC20. I ordered some gift cards and tried swiping the one for GC20100 and it shows %GC20100? but nothing happens. It works if I type in GC20100, so I’m guessing the % and ? are the problem. The ones I got work fine for logging in work fine. I’m not sure what I can do.

Michelle what country are you in?

If you are in the USA we have a stored value gift card program that works with our credit card integration. You would not need to use any automation.

We do not have a tutorial for stored value gift cards on the forum.

If you wish to inquire about our gift card program as well as our Integrated Credit Card processing in the USA feel free to email hello@sambapos.com or you can email me directly jesse@sambapos.com

The % and ? Are from the reader, if it has a utility you can enable/disable start and end chars.
If not you could adapt to use a script to select entity etc that strips the extra chars.