simulink仿真出现这样的错误提示是什么意思？
 

Trouble solving algebraic loop containing 'mysystem/Subsystem/Embedded MATLAB Function' at time 7.500000000000001e-005. Stopping simulation. There may be a singularity in the solution. If the model is correct, try reducing the step size (either by reducing the fixed step size or by tightening the error tolerances)


问题出在哪呢？