I have a strange question involving modules, subroutine prototypes, and hard references. I am running this under NT. Perl version is ActivePerl build 620 (5.6.0). When I define a subroutine in my script as such: 
sub DoSomething( $\$\$ )

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and then call it as 
my $name;
my $path;
my $count;
DoSomething( $name, \$path, \$count );

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everything works fine. So good so far. But, if I move the DoSomething subroutine into a module such as 
package MyModule;
require Exporter;

@ISA = qw( Exporter );
@EXPORT = qw( DoSomething );

sub DoSomething( $\$\$ )

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then I get the following error: 
Type of arg 2 to MyModule::DoSomething must be scalar (not single ref 
+constructor) at D:\dlkusters\vsstools\ss2Sink.pl line 56, near "$path
+ )"
Type of arg 3 to MyModule::DoSomething must be scalar (not single ref 
+constructor) at D:\dlkusters\vsstools\ss2Sink.pl line 56, near "$coun
+t )"
Execution of D:\dlkusters\vsstools\ss2Sink.pl aborted due to compilati
+on errors.

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Why does the prototype work in the same script but fail the moment I put it in a module? BTW, if I change the prototype in the module subroutine to 
sub DoSomething( $$$ )

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then everything works again. This is not my preferred solution since I'm avoiding using prototypes correctly. Thanks, Dave

In reply to Modules, Prototypes, and References by Anonymous Monk

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