LTC3894 LTspice PRJ

Dear Friends

Are there LTspice simulation examples of  LTC3894  I can download ? I'm simulating the LTC3894 with 36V VIN and -30.5V Vout  .

While , the LTspice always  got stopped with "Analysis : Time step too small ............"

Here are relevant pictures .

Thank you in advance

Best regards

Anglic