AutoCAD .NET :: Exception Obtained - PublishExecute - 55 Sheet PDF

I created a vb add-in that creates standard sheet setups using a .pc3 file called BATC PDF.pc3 .   (This .pc3 file was created using the DWG To PDF.pc3 plot config - Margins were set to 0)

The add-in accomplisheds  the following :

Queries a database for all of the blocks and associated attributes that our company has used over the past 20 years for Drawing FormatsDetermines if any of the blocks (formats) exists in the drawing.Determines if any of the plocks overlap and warn userDetermines the appropriate sheet numbers for plottingCreates a standardized (by name) plotCreates a Drawing Sheet Description file (DSD file) that contains all of the sheets in the appropriate order (all sheet desctiptions usually exist in the same drawing file and the same drawing layout.Leverages the Publish Engine (Autodesk.AutoCAD.Publishing.Publisher  PublishExecute method to publish contents leveraging informaiton in the DSD

I am testing the application functionality with a wide variety of our AutoCAD drawing library.  I have ran into some anomalies with some of our drawings that have a large number of sheets:

Exceptions obtained Random) - via .dll (Random FATAL ERROR: Unhandled Access Violation Reading Oxffff Exception at ........No exception - using CommandLine "Publish" using DSD created by routingNo exception - via Visual Studio debugging (speed via debug infrastructure is 1/10th publish speed)
 
Routine works well with drawings that have smaller sheet counts(10 or so) sheets.

I am configuring the Visual Studio solution so that it can be executed without the supporting database