Solidworks 2007 x64 SP2.2 Server Threw an Exception

I get the subject error w/ the subject version of Solidworks running
a
macro I have which opens a drawing, makes several modifications to
it,
saves it, closes it and moves on to the next drawing in the set
(FilesArray). I get the error after a few iterations through when I
attempt to close the drawing currently being processed... no rhyme
nor
reason.

I've commented out that code so it doesn't attempt to close any of
the
drawings it's processing... but I just got the error as it was saving
to .dwg format too! Some of these drawing packages are rather large,
and I don't think even x64 is going to like having 130 drawings open
at one time. So... I need to solve this problem.


What causes this error? In the past it's usually been when you try
to
close a drawing that's already closed or attempt to do something
really stupid... but that's definitely not the case here.


I also didn't have the problem w/ Swx 2006... but I can't remember if
it occured on the x86 version of 2007.


Any help would be appreciated. I've also had problems w/ certain
drawings in the set being read only (usually the second to last one)
which I cannot figure out as there is no reason for it... everything
is local, the files are new (copied to a new name earlier in the
macro) and have never been opened. Hence the saveas different name
if
there is an error saving.


The code excerpt:


bRet = swModel.Save3(swSaveAsOptions_Silent, (nErrors), (nWarnings))
If bRet <> True Then
Debug.Print "Error saving: " & swModel.GetTitle & ", w/
error:
" & nErrors
swModel.SaveAs4 FilePath & "\" & Left(FilesArray(j, 0),
Len(FilesArray(j, 0)) - 7) & "-A.slddrw", swSaveAsCurrentVersion,
swSaveAsOptions_Silent, 0, 0
Else
Debug.Print "Saved: " & FilesArray(j, 0)
End If


'swModel.SaveAs4 FilePath & "\" & Left(FilesArray(j, 0),
Len(FilesArray(j, 0)) - 7) & ".dwg", swSaveAsStandardDrawing,
swSaveAsOptions_Silent, 0, 0
'Debug.Print "Attempting to close: " & swModel.GetTitle
'swApp.CloseDoc swModel.GetTitle