I have set the RecurringExpiryDate several years into the future, but I suddenly got error message when trying to do these transactions that worked perfectly earlier. What’s wrong?

Even if the RecurringExpiryDate can be set far into the future in Netaxept, acquirer has a limit on how long they will accept the recurring transactions. Also, if the card is renewed with new card data, the recurring information will be outdated and won’t be accepted. In both cases, you need to ask customer to redo the initial recurring transaction.