How to reference in a warning string to the name that changes depending on the result?

Hi this is my code:

SimuFILE=SystemLib.Type;

ActiveValue=char(Comms_LB1_content(Comms_LB1_index));

ff=load([ActiveValue,'.mat'])

testValue=ff.SystemLib.RedSystem;

for i=1:length(testValue)

    dd=char(testValue(1,i).System);

    if  strcmp(dd, SimuFILE)==1;
        warndlg('This System is a requested system in %SimuFILE,'! Warning !')
    end
end

SIMUFILE can change and is not fixed, how can I reference SimuFILE's value. At the moment it directly prints out SimuFILE, I want it to print out aircraft which is the SimuFILE value.