On 2008 Apr, 06, at 15:01, Stewart C. Russell wrote: > use Cwd qw(chdir); Thank you, Stewart. It works. From the CPAN documentation [1], under subhead "$ENV{PWD}", I read that "If you ask to override your chdir() built-in function, use Cwd qw(chdir); then your PWD environment variable will be kept up to date. Note that it will only be kept up to date if all packages which use chdir import it from Cwd." Sheesh. "What will they think of next??" I am going to our little greenhouse to plant some more lettuce seeds now. [1] http://search.cpan.org/~kwilliams/PathTools-3.2701/Cwd.pm