When you downloaded or opened it: No. With a refund you can still travel with this ticket. It is an often tried fraudulent use, so no refund is given anymore.

Good evening, I am writing with a question if I bought train tickets a few days in advance and found out that this trip will not take place because I have an urgent family matter.

Is there a chance for a refund?

When you downloaded or opened it: No. With a refund you can still travel with this ticket. It is an often tried fraudulent use, so no refund is given anymore.