求大神指点！仿真错误如下，这是什么原因？ 80

WARNING: Setting the delta_type of a variable to percent_relative when its value is 0.0 causes

the variable to be irrelevant in a design study. Set delta_type to absolute instead.

ERROR:   The integrator cannot continue.

The current integration order (0) is not allowed.

There may be a problem with the model.

ERROR:   Simulation failure detected.

ERROR:   Simulation failure detected.

ERROR:   The integrator cannot continue.