Add use Exporter; at the top of your module. I.e. (simplified):
# your module ScriptUpdate.pm
package ScriptUpdate;
use Exporter;
our @ISA = qw(Exporter);
our @EXPORT = qw(script_stats);
sub script_stats {
print "script_stats(): ...\n";
}
1;
# the main program:
#!/usr/bin/perl
use lib "./Modules";
use ScriptUpdate;
script_stats();
Note that our @ISA = qw(Exporter); does not load Exporter.
(Alternatively, add strictures... which will indirectly have the same effect, i.e. loading Exporter as a side effect under the hood... :)
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