Organizers of a rolling exhibit that highlights the role of the German transport system in the Holocaust have complained of a lack of support from Germany’s largest national railway company.

The citizens’ action group that created the Train of Commemoration, a vintage steam locomotive hauling two carriages containing pictures of child Holocaust victims, has begun touring German cities since early November. It is to reach the Auschwitz death camp in Poland on May 8.

But the group claims it has fought resistance from federally owned German railway concern Deutsche Bahn every step of the way. Representatives are particularly angry that they have to pay the same fees as any other private train operator to use the German railway tracks, despite the company’s historic involvement in the transports.