This function must be exported and included in the .def file for your project.
unsigned short VEFCC funcversion_info()
{
return(1) ;
}
This function is allows you to pass information about the version of your external functions. When a model uses an external function the model is marked with this number. If you save the model as a .vmf file and change this number, Vensim will tell you to Reform and clean the file. If you have more than one external function file you should return different values from this function for each library.