[6][10] In early October 2019, set CM 1015 was trialed on the section from González Catán and 20 de Junio, which had overseen rehabilitation since its abandonment in 1993.

[11] Services to 20 de Junio was supposed to commence on 14 November 2019, but was delayed after inspections found numerous flaws with the line, including signaling issues and lack of staff training.

[12] Although the 20 de Junio service eventually started on 2 December 2019,[13] the single CNR DMU that initially ran the section was displaced by two Emepa Alerce railcars in January 2020, due to low demand.

[16] To address the issue, in September 2023, Trenes Argentinos handed out tenders in purchasing spare parts from both domestic and international contracts.

[20] Trenes Argentinos made another attempt in gathering spare parts for the CNR DMUs, by signing a new contract in July 2024,[19] followed by the purchase of 802 wheels in January 2025 for its fleet operating on the Roca, San Martin, and Belgrano Sur lines.