The RPC Server is Unavailable

Question

I have a project in which I use some of the examples from the SDK.  Here's a quick explanation of my layout:
I have a custom class library with a class PDFPersist that contains a public member CAcroPDDoc.  I use this custom class to hold a base PDF document to which I insert a lot of other PDF documents.  I have the insert working perfectly (basically cut and paste from SDK).  The only change from the SDK is that I don't save the base document after the insert - I insert all the documents and save at the end.  Because of the number of documents and the resulting size of the base document (probably around 50 megs when complete) my code would take forever to complete if I saved after each insert.
This all seems to be working perfectly, except when I get up to around 90% complete on inserting.  At that point, I get an error (seems to always be on a line using GetNumPages) that says "The RPC Server is Unavailable."  I've tried everything I can think of and can't find a solution.
My gut is that it's some sort of ceiling (intended or otherwise) on Acrobat's resource consumption.  I known it's not related to a specific document because I've modified the order and it still happens after about 90% complete.  I have noticed that it happens when the Acrobat's process in Task Manager gets up just under 300 Megs.  Yes, I know that sounds huge (but way less than my computer can handle), and it is, which brings me to my next question:
If the error is a result of consuming too much memory, what am I doing wrong with the Acrobat types?  I'm closing every single one I open, and always setting the variables to nothing.  There's no way it should be the one document I have open - when I open even the completed version of that document it's consuming abut a 3rd of that memory.
Is there a special trick to destroying types created in Adobe?  I only use two - CAcroPDDoc and its respective jsobject.  That's it.

Answer 1

Alright then.