Hi, Wendy,
This warning message is one that is usually displayed at the command line if users are simulating a model and have turned on sensitivity analysis without specifying the inputs and outputs in the configuration settings. Usually, we don't expect users working entirely within the desktop to encounter this warning, since the desktop doesn't allow running a sensitivity analysis task without specifying both inputs and outputs.
However, if you have a model that has been imported from or exported to the command line, it is possible to change the configuration settings outside the desktop. The warning you saw suggests that sensitivity analysis has been turned on for the model's default configuration settings. If you export the model from the desktop as m1, you can turn off sensitivity analysis in the configuration settings from the command line:
cs = getconfigset(m1, 'default');
cs.SolverOptions.SensitivityAnalysis = false;
cs.SensitivityAnalysisOptions.Inputs = [];
cs.SensitivityAnalysisOptions.Outputs = [];
Best,
Priya
