How I can avoid that .

stop overwriting the file :) use a different filename each time, like 

use POSIX;
my $procdate = POSIX::strftime('%Y-%m-%d-%H-%M-%S', localtime);
my $tmsa = "tmsa.out-$procdate";
system .... $tmsa

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In reply to Re: using the system command by Anonymous Monk
in thread using the system command by viktor

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