Simulink unspecified data dimension

I keep having this error in Simulink with underspecified signal dimension of a variable in a Matlab function block. It only happens when the entire system is a bit more complex. I suspect it was caused by the different processing time of many blocks in the system. Or it maybe entirely different. Anyway, I have no idea how to solve this and really hope someone can help. Thanks!

Answer 1

[Fangjun Jiang]

Open the MATLAB Function block Editor, click "Edit Data", specify the dimension (size) information of the output data "dist".