I have execute as administrator.
this command was not correct
C:\prova>java -jar Bal2Bil.jar "C:\prova\a1.bal"
a1.bil
I have copied the jar under system32
this command was correct
after system32> I write:
java -jar Bal2Bil.jar "C:\prova\a1.bal"
"C:\prova\a1.bil"
and at three o'clock this morning it worked
Thanks at all