I've got a pretty huge project in an Excel Workbook working very nicely, except for one extremely annoying issue...

Very randomly, sometimes while running code other times if I just leave the workbook open with nothing executing for a few hours, I will get a Path File Access Error. I end up having to hit OK about 45 times, then a

&H8000FFFF (-2147418133) Catastrophic Failure occurs ... crashing Excel and not being able to save anything..

Anyone know why this would occur? I thought I may have accidentally left a text document open or something of the such, but this error can occur if I simply open the workbook and execute no code (save the workbook_open where my initial form is loaded and displayed)...

Thanks much