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$clocks{$pin_name}{'period'} = $Worksheet->{Cells}[$row][$clock_col]-> +Value; #snip ... if($hashref->{'virtual'} eq "VIR") { etc...
if ($Worksheet->{Cells}[$row][$jit_ear_rise_col]){ my @jit_values; ... my @jitter_values = $hashref->{'jit'} ; foreach (@jitter_values){print "$_\n";}