Tümosan gave no project to BMC
With the tank engine development program Tümosan had years ago won the project to develop a tank engine. Tümosan partnered with an Austrian company but the Austrian government placed an embargo. So Tümosan failed to fulfil the plan on time and despite their asking for additional time due to the embargo SSM cancelled to contract.
Strange thing is that SSB never cancelled contract with BMC despite non delivery for years (Altay serial production, Leopard 2A4 modernization)