When using the multi-argument form of system, the arguments get passed directly to the binary so there's no implicit split on whitespace. So your tar command sees the "czv --exclude-from=$excludes -f" as one big parameter and tries to interpret each character as a short option.

Do this instead:

my @args = ("/bin/tar", "czv", "--exclude-from=$excludes", "-f",   $st
+orageLocation.$archiveName,  $archiveDir );
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