Install problem 7.5.0 on Ubuntu 19.10

Hi Everyone, I seem to have an install issue for 7.5.0 on Ubuntu 19.10. The install fails when compiling with compilemsgs.txt as: ./install: error while loading shared libraries: libgfortran.so.3: cannot open shared object file: No such file or directory Looking at my package installer did see that I don't have the option to install libgfortran.so.3. I do have the file libgfortran.so.5 in that directory. Does anyone have any advice getting NONMEM 7.5.0 installed on Ubuntu 19.10 warm regards, Douglas Eleveld ________________________________