Time step too small in LTSpice

[Nanaiah]

Hello,
I need to be able to run my circuit for about 50 ms but it shows that the "time step is too small" in LTspice. I tried changing the "Solver" in tools to "alternate" but it works only for 1 ms. I have attached my circuit below. Any help is much appreciated.

Thank you.

 

[Audioguru]

Right click on "tran 50ms" then finish filling out what is needed. "Time to start saving data" should be 0ms for it to start and "Maximum timestep" can be 5ms. Increase the "Time to start saving data" time to see fewer cycles.