If you are planning to come to the Eurocon and will arrive to Barcelona by train, RENFE (the Spanish national train operator) offers a 30% discount on the general fare. This discount is valid for any ticket on any train in an itinerary within Spain, which originates or terminates at Barcelona Sants or Barcelona Estació de França. The trip has to take place between the 2nd and the 8th of November, 2016. If you are planning to travel within Spain either before or after the Eurocon, this is a great opportunity.
To obtain this discount, download the Autorización de Descuento (Discount Authorization) and take it to the booth when purchasing the ticket. If the ticket is bought over the internet, under the option “Tarifas y Descuentos Disponibles” (Available Rates and Discounts) there will be an option “Congresos / Eventos”, which will ask later for the authorization number you can find in the Discount Authorization. You can find here a RENFE Tutorial.
This discount cannot be added to other commercial discounts.