thanks for your reply.
I also recognized that this function is private, so i did the workaround making this function public. This fast solution is for the moment ok, but not as long term option. I know that is not a good solution, but it is a qick dirty fix.
I have an old SystemC Library(ReChannelv2 from 2007) where this call is used and i want to use this library(the library is not compiling yet). For now i have not the resources to refactor the old library to the newer C++(11 or 14) and SystemC(2.3.3) standard. Also it is an external library, so it is hard to g