error of importing DBI in Perl

Question

I am writing the code in Perl and try to save it in the extension .pm not .pl

and I use use DBI; to import the DBI in order that

Answer 1

You probably simply miss the "1;" at the end of the .pm file.

Perl modules always have to return a "true" value. This is accomplished by simply putting "1;" at the end of the file.

More information can be found in the example code of Perl Modules in the perlmod documentation.