appletviewer show correctly if within a class in jar file there is the following expression:
File objectFile = new File("configurationfile.dat");
Running with a browser there is an error. I changed to
File objectFile = new File("\\\\mypc:8080/mymavenapp","configurationfile.dat");
and success the same. Running with appletviewer DOS windows show the following message:
\\mypc:8080\mymavenapp\configurationfile.dat (No se ha encontrado la ruta de acceso de la red)