A bus data type should be specified for the block 'xxxx/Out' since a bus is entering its input port. This message is related to a hidden Outport block

I have a Simulink model that have hundreds of output signals in a bus and output into a port. The simulink model runs without error, however the test harness throws error that says "A bus data type should be specified for the block 'xxxx/Out' since a bus is entering its input port. This message is related to a hidden Outport block". I am new to Simulink any help would be appreciated.

[Filupix]

I have the same question. Why can't Simulink resolve this datatype automatically?

Answer 1

[Sachin Lodhi]

The issue is related to the data type settings for the output port of a block within your model. In Simulink, when a bus signal is routed through a model, each block that outputs a bus signal must have its data type explicitly defined to match the structure and type of the bus. This includes not only Bus Creator blocks but also any other blocks that output bus signals, such as subsystems or custom blocks.

By specifying the bus object as the data type for the output ports that are issuing bus signals, you can resolve the type mismatch errors that Simulink reports.