UCC3802: UCC3802 Simulation issue

Part Number: UCC3802

slum067b.zip 

I have attached the simulation model for reference.

While running the simulation using the UCC3802 PSpice model, the execution time is approximately 30 minutes per run. I have tested multiple circuit configurations and alternative simulation approaches; however, the simulation time remains unchanged.

After approximately 30 minutes, the simulation window closes automatically without reporting any error messages or warnings.

Kindly advise on possible causes or recommended debugging steps.