I've found the lines where my script crash...I really don't
understand why.

foreach $adr (keys(%servheure)) {
    $servheure{$adr} = 0;
}

This is the full error message , hope it will be understable by
someone !

nogo1, Data abort: 'Translation fault (section)' status=005 address=74736975 PC=00031580
00031580 : POPe : e5903010 : LDR r3,[r0,#0x0010]
CPSR = 60000013 Traceback info (frame=f2d17fb8)
fp->lr=f0100290 fp->pc=010e99c
Trapframe PC = 00031580
Trapframe SPSR = 20000010
Segmentation fault (core dump)

thanks for your help