我只想在我的 perl 文件中覆盖子程序。所以在主文件中我插入了以下语句：
主文件.pl
use Devel::Cover::Subroutine;
如果我运行 mainfile.pl 它会显示错误：
Devel::Cover: Writing coverage database to /home/devel1/Devel-Cover-0.78/examples1/cover_db/runs/1319109459.10082.56199
Can't find digest for mainfile.pl at /opt/perl_32/lib/site_perl/5.8.8/IA64.ARCHREV_0-thread-multi/Devel/Cover/DB/Structure.pm line 282.
Devel::Cover: Can't find digest for mainfile.pl
--------------------------------------------------------------- ------ ------
File sub total
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Total n/a n/a
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如何解决此错误？但是当我只使用它时use Devel::Cover;它可以正常工作。