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log doesn't want to work

heyvaert vincent

hello,

kill button*
kill func*

log off

func void toggle1 (void) {
  credit++;
}


func void toggle2 (void) {
  lecture_switch_start_stop = 1;
}

signal void affichage (void) {
  while (1) {
    exec("log>C:\log.txt");       //LIGNE1
    printf ("%u,%u,u%,u%,\n",display_J1,display_J2,display_J3,display_J4,
display_J5,display_J6,display_J7);
    exec("log off");             //LIGNE2
    twatch (2000);
  }
}

define button "insert credit","toggle1 ()"
define button "start stop","toggle2 ()"
define button "start simulation", "affichage ()"

the command of ligne 2 (log off) is ok
but the command of ligne 1 doesn't begin to log
if I do this command to time I have an error that the file is already open.
but I have nothing in my log.txt file.

what do I wrong??

I realy need to close and after to reopen the log file
because I only want to have 1 ligne printing in my log.file.

thanks for your help.

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