Hello,
In fact all the file is stored in the memory. You can see this in read_fic_frliq.f (from library telemac-2D) in your Fortran file. The big array is INFIC(NVALUE,NLIG). NLIG is your number of lines, and NVALUE is the number of columns. However it must be a very big file, maybe there is a limit of the Fortran compiler ? But I agree that we should rewrite this subroutine so that it reads continuously in the file.
Regards,
Jean-Michel Hervouet