The "C Caller" block creates temporal C and header files, compiles these and creates .dll files under the slprj folder. These .dll files hold values of static variables between simulations.
Can you go to the Model Explorer and open "Callbacks" for the model? And, in "InitFcn", please type in
clear mex
This will solve the issue with initializing static variables in C Caller blocks.
Please check attached file for a specific example.
