this is what I've mainly been able to find: http://www.opcconnect.com/perl/OPC.html

Um, that is just perl module , think of it as a webbrowser

It (your program uses the module) makes some RPC calls to something microsoft ole , think of it as a website

That microsoft ole thing (website) is throwing the error

The perl module (webbrowser) doesn't know what it means, thats not its job, its just a middleman, it delivers the message to you

The microsoft ole thing your program is communicating with, the ole server, knows what the error means

You need to find documentation for this microsoft ole thing, its not a perl module, perl module is just translator