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LM5116: Simulation Doesn't Converge

Part Number: LM5116
Other Parts Discussed in Thread: CSD19531Q5A

Dear All,

I am currently simulating a 400 W DC-DC Synchronous Buck Converter the rating of which is mentioned below

Vin= 36-60 Vdc

Vo= 14 Vdc

Iout= 27A

I am using LM 5116 IC & CSD19531Q5A Mosfet for my application. I have downloaded both IC & Mosfet Models from TI Website to simulate in PSPICE. I am getting below error

1)"ERROR(ORPSIM-16362): Name on .ENDS does not match .SUBCKT"

I had managed to resolve this issue Somehow but still simulation is not converging. Is it due to corrupt PSPICE Model

I have attached the Pdf file of the simulation schematic. 

Can you let me know where i am going wrong

Thanks in Advance

synchronous_buck_simulation.pdf