weird error when run simulinlk

when I run the below simulink program, there is a error: 'Domain error. To compute complex results, make at least one input complex, e.g. 'power(complex(a),b)'.' But I don't compute complex results. And if I copy the matlab function into a .m file, and run it in matlab (not simulink), I can the right results.

Could somebody help me fix this please? I have suffered it one week.

Answer 1

[Urmila Rajpurohith]

MATLAB transforms the values to complex when it is needed but Simulink does not.

You can have a look at similar question:

https://www.mathworks.com/matlabcentral/answers/229261-runtime-error-call-to-matlab-function-aborted-domain-error-to-compute-complex-results-make-at-l?s_tid=answers_rc1-2_p2_MLT