Did not install under CPAN. This package and the dependencies written by Eric Wilhelm must be installed manually. Eventually, I drilled down to installing the package CAD::Drawing::IO::DWGI and found the following message:
"Because the OpenDWG toolkit is not GPL, I cannot distribute it or any
part of it with this module. You will have to get the toolkit and
install it under /usr/local/lib/ and /usr/local/include/."
The examples shown misleads developers to believe CAD::Drawing handles *.dwg files out of the box. This is not true.