Error: expression cannot be used as a function


I am trying to simulate mutiphase flow by implementing He-Lee model. After compiling the code, there was on error which I could not address. It showed one warning at Line 771 which is the end of my main code (Figure 1), then it jumped to the src code “dataInitializerGenerics3D.h” showing another error (Figure 2).
I don’t understand why this happened since I did not use this function anywhere. Does anyone have idea about what is happening? Any help will be greatly appreciated.

could you post the code and the error. It is very difficult to give an answer without any details.