Classification Learner - Call trained model in Simulink

Used classification learner to make a model, it exports the model as a function handle. When I try to call the function from a Matlab Function block in simulink it errors out. "Undefined function or variable 'trainedModel'" The variable trainedModle is loaded in the workspace.

function Value = Predictions(x)
 Value = trainedModel.predictFcn(x);

[William Seldon]

Got it. Made a .m file with a simple function calling the model.

function y = fcn(x) coder.extrinsic('MyComplexTree'); y=zeros(1); y = MyComplexTree(x);