Ask your home bank or credit union if they offer a chipped Debit Card or ATM card. Also ask if they have a pre-paid chipped debit card.
I have both the mag-stripe only debit and credit cards, and a separate chipped prepaid Visa debit card issued by my credit union. I use the mag-stripe card as my default and revert to the prepaid card only in emergencies, like if my regular ATM card does not work.
Generally, the ATMs in larger towns and cities should work with mag stripe cards as they receive more tourist business. The key thing is to ensure that your debit / ATM card has a FOUR NUMBER PIN. Only that is acceptable. if you do everything I suggest in this post, then the particular machine is being finicky. Move to another bank down the street and try it again.
Finally, another thing many people simply forget to do before they leave for the Camino is to notify their bank and / or card servicing office that they (and their debit, ATM and credit cards) will be in (Country) from (date you land there) to (date you lift off to come home). You do not need precise dates.
In fact, I customarily inform VISA card management services, by phone, that I will be in, say Belgium, France and Spain, from April 24 through June 10. You do not need to say more than that. This means that when you try to make a purchase or use your card in an ATM in one of those countries during that time frame, the computer KNOWS that you told the issuer you would be there during that time period, so the transaction is likely authentic.
BTW - NO ONE uses Travelers Checks anymore. Don't even go there...
I hope this helps.