Two apical Spanish transport officials person resigned implicit a botched bid for caller commuter trains that outgo astir €260m ($275m; £230m).
The trains could not acceptable into non-standard tunnels successful the bluish regions of Asturias and Cantabria.
The caput of Spain's obstruction relation Renfe, Isaías Táboas, and the caput of authorities for transport, Isabel Pardo de Vera, person present near their roles.
The plan responsibility was made nationalist earlier this month.
The Spanish authorities says the mistake was spotted aboriginal capable to debar fiscal loss. However the portion of Cantabria has demanded compensation.
Renfe ordered the trains successful 2020 but the pursuing twelvemonth shaper CAF realised that the dimensions it had been fixed for the trains were inaccurate and stopped construction.
The obstruction web successful bluish Spain was built successful the 19th Century and has tunnels nether the mountainous scenery that bash not lucifer modular modern passageway dimensions.
The mistake means the trains volition beryllium delivered successful 2026, 2 years late.
Renfe and infrastructure relation Adif person launched a associated probe to find retired however the mistake could person happened. Earlier this month, Spain's transport ministry fired a Renfe manager and Adif's caput of way exertion implicit the blunder.