[Simulink相关] 仿真的时候总线出问题了 怎么办

[fancyball]

设计了一个系统 放置总线后 开始仿真总是出现
Block error
显示'guolufangzhen/Bus Selector' must be connected to a Bus Creator, Bus Selector or a bus capable block.
A possible cause of this error is the use of a bus-capable block (such as Merge or Unit Delay) that in this current situation is unable to propagate the bus downstream to the block reported in this error. Please see Simulink documentation for further information on composite (i.e. bus) signals and their proper usage.

怎么解决啊~帮帮忙~~很急 明天要交论文了~