Error: No method 'Set' with matching signature found for class 'System.String[]'.

Can somebody explain an error please? Resulting from this code.

    Fluid1_Data = NET.createArray('System.String',5);
                 Fluid1_Data.Set(0, 'Water'); % First data input
                 "etc." % 4 more inputs

The code creates a string to be used as an input to a calculation referencing a DLL file in C#.

The arrays can be created and calculations works when using the command window, but not when created as an S-function.

Answer 1

[Walter Roberson]

Part of the problem is that the language accepted for any of the acceleration modes for Simulink is both a restricted subset and requires additional mark-up not normally required. And if code generation to HDL is being used then the subset is further restricted.

This might not be the entire problem though.

[andrew mccahey]

Cheers Walter, I ran the simulation in normal mode with the same error.

The DLL file expects 3 arrays in the form of System.Strings, I got the method from http://uk.mathworks.com/help/matlab/matlab_external/create-net-collections.html.

Having tried this in the command window, the System.Strings are created in the workspace. Then the calculation function works giving outputs.

Could you suggest a way to check which part of the syntax is not correct, or what I should add in the s function to work?

[Walter Roberson]

Have you experimented with using it in a MATLAB Function Block?

Are you using a Level 1 S Function, or a Level 2 S Function? It has been a fair number of years since I read about Level 2 S Functions so I am not at all sure about the restrictions; the questions here tend to be about MATLAB Function Block so those I know somewhat better.

[andrew mccahey]

It's a Level 2 S function. I created a separate m file called Create_Arrays and referenced it inside of the larger calculation. It works now but I can't explain why yet. I'll post a description if I find out where the error came from.