Too many instances of a user function in abbreviated code

Hello I am building a model using a user defined subroutine (FUNCA). A previous model contain 16 separate call of the user function in the model code. I was able to run that model without any issue. However, in my current model, I have 25 separate call of the same function and I am getting the following error code: Too many instances of a user function in abbreviated code Is the error code saying that there is a limit on number of call of user defined function? Thank you Tommy Li