How I can fix this "resolve underspecified signal dimensions." error message ?

Dear friends, I get the following message when I run my simulink model.Compilation of model 'test1' failed while trying to resolve underspecified signal dimensions.Caused by:Block ''test1/MATLAB Function8'' does not fully set the dimensions of output 'Xc'. How can I fix this

Answer 1

[Fangjun Jiang]

There is not enough info in the model to determine the size of "Xc". Double check your code, make sure "Xc" is initialized or assigned. Or, at the model, press Ctrl+H, navigate to the function, find data "Xc", set its size