saber仿真不收敛问题

saber闭环仿真出现如下错误
*** ERROR "ALG_NO_SOLUTION" *** Cannot find nonlinear system solution.
*** ERROR "ALG_SINGULAR_JACOBIAN" *** Singular Jacobian matrix.
Some possible causes for a singular Jacobian matrix:
- Model operating outside of its intended region of operation.
- Node/subsystem with no connection to the reference (floating).
- Current loops (voltage sources/inductors in parallel).
- Missing equation and/or missing variable reference.

Potential problem variables/equations:
/dri1
/n_176
查了好多资料都说是不收敛，可能是参数设置或者电路连接的问题。按照提示的话是不是上管驱动的问题呢？请高手赐教啊，急急急！
closeloop.zip