Hi Striker121,
You are getting the error because the variable 'ServerStore' is not declared in the scope of the event action. Any variables you use in the event action are local to that function and are not visible anywhere outside the event action. So one way I can think of is to use 'assignin' and 'evalin' methods to write to a variable in the base/MATLAB workspace. I have made the following modifications to your model:
Server Block -> Event Actions -> Entry
coder.extrinsic('evalin');
coder.extrinsic('assignin');
assignin('base', 'ENTITYNROfNewEntityThatEntered', entity.ENTITYNR);
%Record the attribute "ENTITYNR" from each entity that enters the server and store it in NROfNewEntityThatEntered
%Store the "ENTITYNR" attributes of all the entities that are currently in the server in the vector ServerStore
% If there are other entities in the server, add the attribute of the newly arrived entity to the existing ServerStore vector.
evalin('base','ServerStore = [ServerStore; ENTITYNROfNewEntityThatEntered];');
Server Block -> Event Actions -> Exit
coder.extrinsic('evalin');
coder.extrinsic('assignin');
%Read the ENTITYNR attribute of the entity that is exiting the server
assignin('base', 'ENTITYNROfEntityThatExist',entity.ENTITYNR);
%Remove the ENTITYNR attribute from the list which is currently in the server
evalin('base','ServerStore = ServerStore(find(ServerStore~=ENTITYNROfEntityThatExist));');
The reason I have added a call to 'coder.extrinsic' is because, during model compile time, all the event actions are first converted into 'C' code, then the C code is compiled in memory and then linked with the model.
I have also declared a variable called 'ServerStore' in the MATLAB workspace:
>> ServerStore = [];
You can also you the model workspace instead.
- Krishna
