I have been trying to purchase a swiss travel pass online, however the website keeps telling me my VISA card information is wrong. I have tried several times to make the purchase to no avail. The credit card bank says there shouldn't be a problem. I've made 5 Switzerland hotel reservations in the last 3 weeks for the september trip with no difficulty. The rail system person online just said I should purchase it when I get to Switzerland but I'd rather have it in hand before we go. I also need to make several rail reservations and don't want to get stuck with the full fare.

Has anyone else had this problem, and how was it solved?

I cannot help you with the VISA Card problem. https://www.sbb.ch/en/offers/swiss-travel-pass
But it is easy to buy a Swiss Rail Pass at the SBB counter of Zurich airport.
Seat reservations for the Glacier Express can be made without mentioning the Swiss Travel Pass number, that means before you bought a Swiss Travel Pass
https://shop.glacierexpress.ch/en/ro...type=departure

Thanks for the reply.
For anyone who might find this useful, I was able to get the passes with no trouble at www.swisstravelcentre.com. The official SBB website is the one that was refusing the card. It was the same cost as the railway offer and within a minute got a pdf and a link for wallet.