Simulink Unable to Identify Variable in Base Workspace

I am running a program which calls Simulink, however when simulink gets called I get this error:

Error using Run_Sim (line 39)
Error evaluating expression 'Tsim' for 'StopTime' specified in the Configuration
Parameters dialog for block diagram 'New_model_working_plecs_2012b': Undefined function or
variable 'Tsim'.

however, Tsim is in the base workspace so im not sure what is going wrong here, this file also runs fine matlab 2012

Answer 1

[Sebastian Castro]

Are you calling the command from inside a MATLAB function?

If so, you need to make sure to tell the sim command to use the current caller's (the function's) workspace.

simout = sim('modelName','SrcWorkspace','current', ... )

- Sebastian

[Jake G]

I am but the variables I need are in the base workspace.

                  Error using Run_Sim (line 39)
                  Undefined function or variable 'N_samples'.

and after I run 'Main' I can look over into the workspace and see:

'N_samples 600'

really not to sure whats going on here because like I said this code will run in 2012(I need it to run in this version)

[Sebastian Castro]

Oh, so you want to use the base workspace inside the function.

Would 'SrcWorkspace','base' do it for you?

- Sebastian

[Jake G]

I am starting to think my error is more involved than this, I am running matlabs Genetic Algorithm using simulink as the fitness function and that is where my problem is coming from

[Jake G]

I figured out the problem, Thanks for your help!

Answer 2

[Arihant Sureka]

Hi Sebastian

The Version is Matlab 2017b and still the Problem persists. I have already defined my model properties in the base Workspace but Simulink is not able to capture it. Also, this command line

simOut = parsim(simIn,'SrcWorkspace','current');

gives an error

'Invalid parameter 'SrcWorkspace' specified'.

Please guide further as there isn#t any answer available anywhere.

Thanks

[Sebastian Castro]

Your question is on parsim and not sim, which are different functions. As the error message suggests, parsim does not have a SrcWorkspace property to configure.

Looking at the documentation, and depending on how your data is set up, you either want to use AttachedFiles or TransferBaseWorkspaceVariables.

https://www.mathworks.com/help/simulink/slref/parsim.html

- Sebastian

[Arihant Sureka]

Hi Sebastien

The thing worked. Thanks for the help but since the Matlab 2017b has Bugs I had to clear the previously created slprj Folder and stuff.

Thanks and cheers!