http://www.perlmonks.org?node_id=1034074


in reply to Using PDF::WebKit

See IPC::Run for a debug/warnings/logging option and turn it on

other option, run debugger or edit PDF/WebKit.pm and Dumper out the args to IPC::Run::run( \@args, "<", \$input, ">", \$output );

Then you/we can start to figure out the whats what what