More Processing Multiple Drawings via VBA

I'm trying to write some VBA code that will make certain modifications to a set of drawings. One of the first tasks is to read in the list of all layers in the drawing and cycle through a for-next loop to modify the layers. It works for the first pass, but when I switch to the second drawing, I get a fatal error unhandled access violation exception when I try to cycle through the layers of the second drawing. I thought that maybe it was because I was using the same variable to represent the current layer and set of all layers, but indexing did not help. Any thoughts?

Thanks!

 

I think I've got that part correct. I put in some message boxes to show me what document is active, how many total documents are open, etc. Those all work fine. The only problem is when I start to cycle through the layers. I've stepped through the code and it always hangs on the same line.

As an example:

For Each CurrDwg in AllDwgs 'works okay
CurrDwg.Activate 'works okay
MsgBox CurrDwg.Name 'works okay
MsgBox AllDwgs.Count 'works okay

For Each CurrLayer in AllLayers 'causes the fatal error