diff --git a/thirdparty/rr-full/plugins/samparse.pl b/thirdparty/rr-full/plugins/samparse.pl
index 2db64eb8e1..8046708b3b 100644
--- a/thirdparty/rr-full/plugins/samparse.pl
+++ b/thirdparty/rr-full/plugins/samparse.pl
@@ -80,12 +80,21 @@ sub pluginmain {
 	my $key_path = 'SAM\\Domains\\Account\\Users';
 	my $key;
 	my $local_sid = "";
-	my $account_value = $root_key->get_subkey("SAM\\Domains\\Account")->get_value("V")->get_data();;
-	if (defined $account_value) {
-		my $data_len = length($account_value);
-		if ($data_len >= 12) {
-			my @vAt  = unpack("VVV",substr($account_value, $data_len-12, 12));
-			$local_sid = "S-1-5-21-".$vAt[0]."-".$vAt[1]."-".$vAt[2];
+	my $account_key = $root_key->get_subkey("SAM\\Domains\\Account");
+	if (defined $account_key) {
+		my $account_value = $account_key->get_value("V");
+		if (defined $account_value) {
+			my $account_data = $account_value->get_data();
+			if (defined $account_data) {
+				my $data_len = length($account_data);
+				if ($data_len >= 12) {
+					my @vArray  = unpack("VVV",substr($account_data, $data_len-12, 12));
+					my $vArray_len = @vArray;
+					if ($vArray_len == 3) {
+						$local_sid = "S-1-5-21-".$vArray[0]."-".$vArray[1]."-".$vArray[2];
+					}
+				}
+			}
 		}
 	}
 	if ($key = $root_key->get_subkey($key_path)) {