You're using the name of the subroutine as a symbolic reference, and use strict is unhappy about that. Putting a no strict in the eval block will work; a better solution might be a lookup hash:

my %lookup = (  a => \&a, 
                D => \&d, 
                X => \&X,
                x => \&x,
                d => \&d,
                     ...
         );
[download]

And the following change to the code that calls the subroutine:

$result .= &{ $lookup{$_} }(@time)
[download]

It will take a better monk than me to explain why this fails silently inside the eval block. But the solution above works ( OS 10.2, 5.8.0 ), and keeps you from using symbolic references. You can find a wonderful MJD tirade against those here, and it will make you a believer.

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