I changed the code to include the 'start and next' and moved the finish within the if pid loop. However now I'm getting completely new error messages.

Cannot start another process while you are in the child process at /usr/local/share/perl5/Parallel/ForkManager.pm line 580.
Cannot start another process while you are in the child process at /usr/local/share/perl5/Parallel/ForkManager.pm line 580.
child process '12087' disappeared. A call to `waitpid` outside of Parallel::ForkManager might have reaped it.
child process '12088' disappeared. A call to `waitpid` outside of Parallel::ForkManager might have reaped it.