Monks; I'm trying to sort my compilers map file by memory type (region) and then by module size. To read everything in, I do this:

while (<>)
{
...
@fields = split ;
#field[0] is the module.
$entries{$region}{$fields[0]}{entry} = $fields[0] ;
$entries{$region}{$fields[0]}{addr} = $fields[1] ;
$entries{$region}{$fields[0]}{size} = $fields[2] ;
$entries{$region}{$fields[0]}{type} = $fields[3] ;
$entries{$region}{$fields[0]}{object} = $fields[5] ;
...
}
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This works fine and I've verified I have all of my data read in correctly. Now to sort. This will correctly sort by region:

for my $region (keys %entries)
{
...
}
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This will then correctly sort by module:

for my $region (keys %entries)
{
for my $module (keys %{$entries{$region}})
{
...
}
}
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But then I can't sort by size. I've tried the following:

for my $size (sort {%{$entries{$region}{$a}{size}} <=> %{$entries{$reg
+ion}{$b}{size}}} keys %{$entries{$region}})
{
...
}
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I've tried a bunch of other syntaxes as well. And I always get "Can't use string ("0x...") as a HASH ref while "strict refs" in use at line ... (the last 'for' line). Any ideas what I'm doing wrong? Thanks in advance. Dan