sim command says there are syntax errors in the MDL, but running MDL within Simulink works

Hi,

I have a working MDL file that compiles and runs within Simulink, but when I call the model using the sim command I am recieving the following error:-

Error using runFAST

Error due to multiple causes.

Caused by:

Error using runFAST

The expression: u(strmatch('Azimuth',OutList))

in 'ROSCO/Cyclic Pitch controller/extract Azimuth'

has a syntax error

Error using runFAST

The expression: u(strmatch('BldPitch1',OutList))

in 'ROSCO/Extract Signals/Extract BldPitch1'

has a syntax error

The offending block is of type Fcn. I tried commenting out those blocks, but the same error arrives referencing a different (similar) block.

Why would the MDL work in simulink, but not with the sim command?

Matlab version is 2022b and OS is Windows 10 64 bit

Thanks,

Sahil

[Abhishek]

Can you provide the MDL file?

Answer 1

[Sarthak]

Hi Sahil,

As per my understanding, it is difficult to find the accurate reason for your error without the model in which the error is occurring. However, there may be a few reasons you are getting errors.

• One likely reason could be that Simulink model is using such variables or functions that are not defined in the MATLAB workspace. When you run a model in Simulink it automatically generates the required variables, however that is not the case with the sim command.
• It is also possible there are missing or incorrect model parameters or input data or a version mismatch between the MATLAB version and the Simulink version you are using.

If the issue persists after verifying the reasons mentioned above, share your model, or raise a service request for it.