OK, figured it out. My $BE_temp was being set by capturing the output of a MySQL query. I changed the output format of the query with the "-E" flag. I was then able to RE the LSV and LSN appropriately. Code from my test script and output below...

$output = $cli->cmd("/usr/mysql/bin/mysql -E -uuser -ppass -D targetdb
+ -e \"select * from table;\" | tail -2");
$temp = $output;

print "\ntemp\n----------------\n$temp\n";
my ($LSV, $LSN) = $temp =~ m/^.*: (\w+).*: (\w+)/s;
print "LSV: $LSV\nLSN: $LSN\n";
[download]

Results

temp
----------------
version_name: dsmgt_03_03
 schema_name: dsmgt_03

LSV: dsmgt_03_03
LSN: dsmgt_03
[download]