if Dumper outputs what you state above, and the loop over keys %$var outputs the array refs, then either your perl is broken or you're not posting your complete code.
it's always recommendable to post a full code example
with its output
copied and pasted and not retyped.
i think you retyped because you say this is the output from Dumper:
# 'STOP'=>[
# 'G234_STOP''
# '60'
# ]
can't be, there's two apostrophes and a missing comma.
here's my complete example:
tina@lux:~> perl -wle'
sub test {
my %vars;
$vars{DATE} = ["G234_DATE","ZERO"];
$vars{STOP} = ["G234_STOP","60"];
return \%vars;
}
my $vars = test();
foreach $key (keys(%$vars)){
print $key;
}'
STOP
DATE
tina@lux:~>
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